Page 1 DAQ M Series M Series User Manual NI 622x, NI 625x, and NI 628x Devices M Series User Manual June 2007 371022H-01...
Page 2 Thailand 662 278 6777, Turkey 90 212 279 3031, United Kingdom 44 (0) 1635 523545 For further support information, refer to the Technical Support and Professional Services appendix. To comment on National Instruments documentation, refer to the National Instruments Web site at and enter ni.com/info the info code feedback ©...
Page 3 Instruments Corporation. National Instruments respects the intellectual property of others, and we ask our users to do the same. NI software is protected by copyright and other intellectual property laws. Where NI software may be used to reproduce software or other materials belonging to others, you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction.
Page 4 These classes are known as Class A (for use in industrial-commercial locations only) or Class B (for use in residential or commercial locations). All National Instruments (NI) products are FCC Class A products. Depending on where it is operated, this Class A product could be subject to restrictions in the FCC rules. (In Canada, the Department of Communications (DOC), of Industry Canada, regulates wireless interference in much the same way.) Digital...
Page 5: Table Of Contents
Programming Devices in Software ................2-7 Chapter 3 Connector and LED Information I/O Connector Signal Descriptions ................3-2 M Series and E Series Pinout Comparison ..............3-5 +5 V Power Source ......................3-7 USB Chassis Ground .....................3-7 © National Instruments Corporation M Series User Manual...
Page 6 Contents Disk Drive Power Connector..................3-8 When to Use the Disk Drive Power Connector ..........3-8 Disk Drive Power Connector Installation ............3-8 USB Device Fuse Replacement..................3-9 RTSI Connector Pinout ....................3-12 LED Patterns ......................... 3-13 Chapter 4 Analog Input Analog Input Range.......................
Page 7 AI Pause Trigger Signal ..................4-39 Using a Digital Source ..............4-39 Using an Analog Source ..............4-39 Routing AI Pause Trigger Signal to an Output Terminal ....4-39 Getting Started with AI Applications in Software............4-40 © National Instruments Corporation M Series User Manual...
Page 8 Contents Chapter 5 Analog Output AO Offset and AO Reference Selection................ 5-2 Minimizing Glitches on the Output Signal..............5-4 Analog Output Data Generation Methods..............5-4 Software-Timed Generations ................5-4 Hardware-Timed Generations................. 5-4 Non-Buffered..................5-5 Buffered .................... 5-5 Analog Output Triggering ..................... 5-6 Connecting Analog Output Signals ................
Page 9 Single Two-Signal Edge-Separation Measurement ......7-18 Buffered Two-Signal Edge-Separation Measurement ......7-18 Counter Output Applications ..................7-19 Simple Pulse Generation .................7-19 Single Pulse Generation ..............7-19 Single Pulse Generation with Start Trigger ........7-20 Retriggerable Single Pulse Generation ..........7-21 © National Instruments Corporation M Series User Manual...
Page 10 Contents Pulse Train Generation..................7-21 Continuous Pulse Train Generation..........7-21 Frequency Generation ..................7-22 Using the Frequency Generator ............7-22 Frequency Division ..................7-24 Pulse Generation for ETS ................7-24 Counter Timing Signals....................7-25 Counter n Source Signal ................. 7-26 Routing a Signal to Counter n Source ..........
Page 11 PXI_STAR Trigger ..................9-9 PXI_STAR Filters ...................9-9 Chapter 10 Bus Interface DMA Controllers and USB Signal Stream ..............10-1 PXI Considerations ......................10-2 PXI Clock and Trigger Signals................10-2 PXI and PXI Express..................10-2 Using PXI with CompactPCI ................10-3 © National Instruments Corporation M Series User Manual...
Page 12 Analog Edge Trigger with Hysteresis (Falling Slope) ..... 11-5 Analog Window Triggering ................11-6 Analog Trigger Accuracy ....................11-7 Appendix A Device-Specific Information NI 6220.......................... A-2 NI 6221.......................... A-7 NI 6224.......................... A-24 NI 6225.......................... A-30 NI 6229.......................... A-45 NI 6250.......................... A-61 NI 6251.......................... A-66 NI 6254..........................
Page 13 Figure A-46. USB-6259 BNC Top Panel and Pinout ..........A-117 Figure A-55. USB-6259 Mass Termination Pinout ............A-125 Figure A-56. PCI/PXI-6280 Pinout ................A-130 Figure A-57. PCI/PXI-6281 Pinout ................A-135 Figure A-58. PCI/PXI-6284 Pinout ................A-140 Figure A-59. PCI/PXI-6289 Pinout ................A-146 © National Instruments Corporation xiii M Series User Manual...
Page 14: About This Manual
Text in this font denotes text or characters that you should enter from the monospace keyboard, sections of code, programming examples, and syntax examples. This font is also used for the proper names of disk drives, paths, directories, © National Instruments Corporation M Series User Manual...
Page 15: Related Documentation
Start»All Programs»National Instruments»NI-DAQ»DAQ Getting Started Guide. The NI-DAQ Readme lists which devices are supported by this version of NI-DAQ. Select Start»All Programs»National Instruments»NI-DAQ» NI-DAQ Readme. The NI-DAQmx Help contains general information about measurement concepts, key NI-DAQmx concepts, and common applications that are applicable to all programming environments.
Page 16 The NI-DAQmx Base Getting Started Guide describes how to install your NI-DAQmx Base software, your NI-DAQmx Base-supported DAQ device, and how to confirm that your device is operating properly. In Windows, select Start»All Programs»National Instruments»NI-DAQmx Base» Documentation»Getting Started Guide. Getting Started with NI-DAQmx Base for Linux and Mac Users describes...
Page 17 About This Manual LabVIEW If you are a new user, use the Getting Started with LabVIEW manual to familiarize yourself with the LabVIEW graphical programming environment and the basic LabVIEW features you use to build data acquisition and instrument control applications. Open the Getting Started with LabVIEW manual by selecting Start»All Programs»National Instruments»LabVIEW»LabVIEW Manuals or by navigating to the directory and opening...
Page 18 Select Start»All Programs»National Instruments»NI-DAQ»NI-DAQmx Help. The NI-DAQmx C Reference Help describes the NI-DAQmx Library functions, which you can use with National Instruments data acquisition devices to develop instrumentation, acquisition, and control applications. Select Start»All Programs»National Instruments»NI-DAQ» NI-DAQmx C Reference Help.
Page 19 Device Documentation and Specifications The NI 622x Specifications contains all specifications for the NI 6220, NI 6221, NI 6224, NI 6225, and NI 6229 M Series devices. The NI 625x Specifications contains all specifications for the NI 6250, NI 6251, NI 6254, NI 6255, and NI 6259 M Series devices.
Page 20 PDFs. Refer to the Adobe Systems Incorporated Web site at to download Acrobat Reader. Refer to the www.adobe.com National Instruments Product Manuals Library at ni.com/manuals updated documentation resources. © National Instruments Corporation M Series User Manual...
Page 21: Getting Started
PCI, PCI Express, PXI, PXI Express, and USB devices, as well as accessories and cables. Device Pinouts Refer to Appendix A, Device-Specific Information, for M Series device pinouts. © National Instruments Corporation M Series User Manual...
Page 22: Device Specifications
Chapter 1 Getting Started Device Specifications Refer to the specifications for your device, the NI 622x Specifications, the NI 625x Specifications, or the NI 628x Specifications, available on the NI-DAQ Device Document Browser or , for more ni.com/manuals detailed information about M Series devices. Device Accessories and Cables NI offers a variety of accessories and cables to use with your DAQ device.
Page 23: Usb Cable Strain Relief
Figure 1-2. Thread a zip tie through the cable tie mount and tighten around the USB cable. Figure 1-2. USB Cable Strain Relief on USB-622x/625x Screw Terminal and USB-622x/625x Mass Termination Devices © National Instruments Corporation M Series User Manual...
Page 24 Chapter 1 Getting Started Thread a zip tie through two of the strain relief (USB-622x/625x BNC Devices) holes on the end cap to provide strain relief for your USB cable as shown in Figure 1-3. The strain relief holes can also be used as cable management for signal wires to/from the screw terminals and BNC connectors.
Page 25: Daq System Overview
Figure 2-1. Components of a Typical DAQ System DAQ Hardware DAQ hardware digitizes signals, performs D/A conversions to generate analog output signals, and measures and controls digital I/O signals. Figure 2-2 features components common to all M Series devices. © National Instruments Corporation M Series User Manual...
Page 26: Daq-Stc2 And Daq-6202
Chapter 2 DAQ System Overview Analog Input Analog Output Digital Routing Digital I/O and Clock Interface Generation Counters RTSI Figure 2-2. General M Series Block Diagram DAQ-STC2 and DAQ-6202 The DAQ-STC2 and DAQ-6202 implement a high-performance digital engine for M Series data acquisition hardware. Some key features of this engine include the following: •...
Page 27: Calibration Circuitry
DAQ device can accept. For example, the output voltage of most thermocouples is very small and susceptible to noise. Therefore, you may need to amplify or filter the thermocouple output before digitizing © National Instruments Corporation M Series User Manual...
Page 28: Signal Conditioning Options
Chapter 2 DAQ System Overview it. The manipulation of signals to prepare them for digitizing is called signal conditioning. For more information about sensors, refer to the following documents. • For general information about sensors, visit ni.com/sensors • If you are using LabVIEW, refer to the LabVIEW Help by selecting Help»Search the LabVIEW Help in LabVIEW and then navigate to the Taking Measurements book on the Contents tab.
Page 29: Scc
5B is a front-end signal conditioning system for plug-in data acquisition devices. A 5B system consists of eight or 16 single-channel modules that plug into a backplane for conditioning thermocouples and other analog signals. National Instruments offers a complete line of 5B modules, carriers, backplanes, and accessories. Note 5B is not supported on the PCI-6221 (37-pin), USB-622x/625x Screw Terminal, or USB-622x/625x BNC devices.
Page 30: Cables And Accessories
Chapter 2 DAQ System Overview For more information about SCXI, SCC, and 5B Series products, refer to Note ni.com/signalconditioning Cables and Accessories NI offers a variety of products to use with M Series devices, including cables, connector blocks, and other accessories, as follows: •...
Page 31: Programming Devices In Software
Programming Devices in Software National Instruments measurement devices are packaged with NI-DAQ driver software, an extensive library of functions and VIs you can call from your application software, such as LabVIEW or LabWindows/CVI, to program all the features of your NI measurement devices. Driver software...
Page 32: Connector And Led Information
M Series connectors. USB Device Fuse Replacement LED Patterns sections refer to M Series USB device fuses and LEDs. Refer to Appendix A, Device-Specific Information, for device I/O connector pinouts. © National Instruments Corporation M Series User Manual...
Page 33: I/O Connector Signal Descriptions
Chapter 3 Connector and LED Information I/O Connector Signal Descriptions Table 3-1 describes the signals found on the I/O connectors. Not all signals are available on all devices. Table 3-1. I/O Connector Signals Signal Name Reference Direction Description AI GND —...
Page 34 USER <1..2> BNC connectors allow you to use a BNC connector for a digital or timing I/O signal of your choice. The USER <1..2> BNC connectors are internally routed to the USER <1..2> screw terminals. © National Instruments Corporation M Series User Manual...
Page 35 Chapter 3 Connector and LED Information Table 3-1. I/O Connector Signals (Continued) Signal Name Reference Direction Description CHS GND — — Chassis Ground —This terminal connects to the USB-62xx BNC device metal enclosure. You can connect your cable’s shield wire to CHS GND for a ground connection.
Page 36: M Series And E Series Pinout Comparison
Also refer to Chapter 8, PFI. PFI 7/AI SAMP CLK PFI 7/P1.7 (STARTSCAN) PFI 4/CTR 1 GATE PFI 4/P1.4 (GPCTR1_GATE) PFI 3/CTR 1 SRC PFI 3/P1.3 (GPCTR1_SOURCE) PFI 2/AI CONV CLK PFI 2/P1.2 (CONVERT) © National Instruments Corporation M Series User Manual...
Page 37 On M Series devices, this is the PFI 15/P2.7 terminal. In NI-DAQmx, National Instruments has revised terminal names so they are easier to understand and more consistent among National Instruments hardware and software products. This column shows the NI-DAQmx terminal names (Traditional NI-DAQ (Legacy) terminal names are shown in parentheses).
Page 38: +5 V Power Source
+5 V power unless you use the disk drive power connector. Note The NI 6221 (37-pin) device does not have a +5 V terminal. USB Chassis Ground For EMC compliance, the chassis of the USB M Series device must be connected to earth ground through the chassis ground.
Page 39: Disk Drive Power Connector
Chapter 3 Connector and LED Information Disk Drive Power Connector The disk drive power connector is a four-pin (NI PCIe-625x Devices Only) hard drive connector on PCI Express devices that, when connected, increases the current the device can supply on the +5 V terminal. When to Use the Disk Drive Power Connector M Series PCI Express devices without the disk drive power connector installed perform identically to other M Series devices for most...
Page 40: Usb Device Fuse Replacement
To remove the fuse from the USB-62xx Screw Terminal, complete the following steps. Power down and unplug the device. Loosen the four Phillips screws that attach the back lid to the enclosure, and remove the lid. © National Instruments Corporation M Series User Manual...
Page 41 Chapter 3 Connector and LED Information Replace the fuse while referring to Figure 3-2 for the fuse location. Fuse Figure 3-2. USB-62xx Screw Terminal Fuse Location Replace the lid and screws. M Series User Manual 3-10 ni.com...
Page 42 Remove the four Phillips 4-40 screws that attach the top panel to the enclosure, and remove the panel and connector unit. Replace the fuse. Replace the top panel, screws, nut, and end pieces. © National Instruments Corporation 3-11 M Series User Manual...
Page 43: Rtsi Connector Pinout
Chapter 3 Connector and LED Information To remove the fuse from the USB-62xx (USB-62xx Mass Termination Devices) Mass Termination, complete the following steps. Power down and unplug the device. Loosen the four Phillips screws that attach the lid to the enclosure, and remove the lid.
Page 44: Led Patterns
The device is configured, but there is no activity over the bus. The device is configured and there is activity over the bus. Blinking The POWER (+5 V) LED is available on USB-62xx BNC devices only. © National Instruments Corporation 3-13 M Series User Manual...
Page 45: Analog Input
Each AI channel can use a different mode. • Instrumentation Amplifier (NI-PGIA)—The NI programmable gain instrumentation amplifier (NI-PGIA) is a measurement and instrument class amplifier that minimizes settling times for all input ranges. The © National Instruments Corporation M Series User Manual...
Page 46: Analog Input Range
Chapter 4 Analog Input NI-PGIA can amplify or attenuate an AI signal to ensure that you use the maximum resolution of the ADC. M Series devices use the NI-PGIA to deliver high accuracy even when sampling multiple channels with small input ranges at fast rates. M Series devices can sample channels in any order at the maximum conversion rate, and you can individually program each channel in a sample with a different input range.
Page 47 –2 V to 2 V 32 μV –1 V to 1 V 16 μV –500 mV to 500 mV 6.4 μV –200 mV to 200 mV 3.2 μV –100 mV to 100 mV © National Instruments Corporation M Series User Manual...
Page 48: Analog Input Lowpass Filter
Chapter 4 Analog Input Table 4-3. Input Ranges for NI 628x Nominal Resolution Assuming Input Range 5% Over Range 80.1 μV –10 V to 10 V 40.1 μV –5 V to 5 V 16.0 μV –2 V to 2 V 8.01 μV –1 V to 1 V 4.01 μV...
Page 49: Analog Input Ground-Reference Settings
The NI-PGIA drives the ADC with this amplified voltage. The amount of amplification (the gain), is determined by the analog input range, as shown in Figure 4-2. © National Instruments Corporation M Series User Manual...
Page 50 Chapter 4 Analog Input Instrumentation Amplifier PGIA Measured in– Voltage – ] × Gain = [V – V in– Figure 4-2. NI-PGIA Table 4-5 shows how signals are routed to the NI-PGIA. Table 4-5. Signals Routed to the NI-PGIA AI Ground-Reference Signals Routed to the Positive Signals Routed to the Negative Settings...
Page 51: Configuring Ai Ground-Reference Settings In Software
The NI-PGIA then amplifies the input signal with the gain for the new input range. Settling time refers to the time it takes the NI-PGIA to amplify the input signal to the desired accuracy before it is sampled by the © National Instruments Corporation M Series User Manual...
Page 52: Use Low Impedance Sources
The capacitance of the cable also can increase the settling time. National Instruments recommends using individually shielded, twisted-pair wires that are 2 m or less to connect AI signals to the device.
Page 53: Carefully Choose The Channel Scanning Order
0, 2, 1. Inserting a grounded channel between signal channels improves settling time because the NI-PGIA adjusts to the new input range setting faster when the input is grounded. © National Instruments Corporation M Series User Manual...
Page 54: Minimize Voltage Step Between Adjacent Channels
Chapter 4 Analog Input Minimize Voltage Step between Adjacent Channels When scanning between channels that have the same input range, the settling time increases with the voltage step between the channels. If you know the expected input range of your signals, you can group signals with similar expected ranges together in your scan list.
Page 55: Analog Input Data Acquisition Methods
One property of buffered I/O operations is the sample mode. The sample mode can be either finite or continuous. © National Instruments Corporation 4-11 M Series User Manual...
Page 56: Non-Buffered
Chapter 4 Analog Input Finite sample mode acquisition refers to the acquisition of a specific, predetermined number of data samples. Once the specified number of samples has been read in, the acquisition stops. If you use a reference trigger, you must use finite sample mode. Continuous acquisition refers to the acquisition of an unspecified number of samples.
Page 57: Connecting Analog Input Signals
Chapter 4 Analog Input Connecting Analog Input Signals Table 4-6 summarizes the recommended input configuration for both types of signal sources. © National Instruments Corporation 4-13 M Series User Manual...
Page 58: Isolated Outputs
Chapter 4 Analog Input Table 4-6. Analog Input Configuration Floating Signal Sources (Not Connected to Building Ground-Referenced † Ground) Signal Sources Examples: Example: • Ungrounded thermocouples • Plug-in instruments with non-isolated outputs • Signal conditioning with isolated outputs AI Ground-Reference Setting •...
Page 59: Connecting Floating Signal Sources
In the single-ended modes, more electrostatic and magnetic noise couples into the signal connections than in DIFF configurations. The coupling is the © National Instruments Corporation 4-15 M Series User Manual...
Page 60: When To Use Referenced Single-Ended (Rse) Connections With Floating Signal Sources
Chapter 4 Analog Input result of differences in the signal path. Magnetic coupling is proportional to the area between the two signal conductors. Electrical coupling is a function of how much the electric field differs between the two conductors. With this type of connection, the NI-PGIA rejects both the common-mode noise in the signal and the ground potential difference between the signal source and the device ground.
Page 61 NI-PGIA). Floating Signal Source – AI– R is about AI SENSE 100 times AI GND source impedance of sensor Figure 4-5. Differential Connections for Floating Signal Sources with Single Bias Resistor © National Instruments Corporation 4-17 M Series User Manual...
Page 62 Chapter 4 Analog Input You can fully balance the signal path by connecting another resistor of the same value between the positive input and AI GND, as shown in Figure 4-6. This fully balanced configuration offers slightly better noise rejection, but has the disadvantage of loading the source down with the series combination (sum) of the two resistors.
Page 63: Using Non-Referenced Single-Ended (Nrse) Connections For Floating Signal Sources
NRSE bias resistors as well. Replace AI– with AI SENSE in Figures 4-4, 4-5, 4-6, and 4-7 for configurations with zero to two bias resistors. The noise © National Instruments Corporation 4-19 M Series User Manual...
Page 64: Using Referenced Single-Ended (Rse) Connections For Floating Signal Sources
Chapter 4 Analog Input rejection of NRSE mode is better than RSE mode because the AI SENSE connection is made remotely near the source. However, the noise rejection of NRSE mode is worse than DIFF mode because the AI SENSE connection is shared with all channels rather than being cabled in a twisted pair with the AI+ signal.
Page 65: Connecting Ground-Referenced Signal Sources
DIFF signal connections also allow input signals to float within the common-mode limits of the NI-PGIA. Refer to the Using Differential Connections for Ground-Referenced Signal Sources section for more information about differential connections. © National Instruments Corporation 4-21 M Series User Manual...
Page 66: When To Use Non-Referenced Single-Ended (Nrse) Connections With Ground-Referenced Signal Sources
Chapter 4 Analog Input When to Use Non-Referenced Single-Ended (NRSE) Connections with Ground-Referenced Signal Sources Only use non-referenced single-ended input connections if the input signal meets the following conditions. • The input signal is high-level (greater than 1 V). • The leads connecting the signal to the device are less than 3 m (10 ft).
Page 67: Using Differential Connections For Ground-Referenced Signal Sources
V in the figure. AI+ and AI– must both remain within ±11 V of AI GND. © National Instruments Corporation 4-23 M Series User Manual...
Page 68: Using Non-Referenced Single-Ended (Nrse) Connections For Ground-Referenced Signal Sources
Chapter 4 Analog Input Using Non-Referenced Single-Ended (NRSE) Connections for Ground-Referenced Signal Sources Figure 4-11 shows how to connect ground-reference signal sources in NRSE mode. I/O Connector AI <0..15> or AI <16.. n > Instrumentation Ground- Amplifier Referenced Signal – Source PGIA Input Multiplexers...
Page 69: Field Wiring Considerations
M Series devices have a flexible timing engine. Figure 4-12 summarizes all of the timing options provided by the analog input timing engine. Also refer to the Clock Routing section of Chapter 9, Digital Routing and Clock Generation. © National Instruments Corporation 4-25 M Series User Manual...
Page 70 Chapter 4 Analog Input PFI, RTSI PXI_STAR Analog Comparison Event PFI, RTSI ai/SampleClock Ctr n Internal Output PXI_STAR SW Pulse ai/SampleClock Analog Comparison Timebase Programmable Event Clock 20 MHz Timebase Divider 100 kHz Timebase PFI, RTSI PXI_STAR PXI_CLK10 Analog Comparison Event ai/ConvertClock Ctr n Internal Output ai/ConvertClock...
Page 71 The value decrements with each pulse on ai/SampleClock, until the value reaches zero. The sample counter is then loaded with the number of posttriggered samples, in this example, three. © National Instruments Corporation 4-27 M Series User Manual...
Page 72: Ai Sample Clock Signal
Chapter 4 Analog Input ai/StartTrigger ai/ReferenceTrigger ai/SampleClock ai/ConvertClock Scan Counter Figure 4-15. Pretriggered Data Acquisition Example If an ai/ReferenceTrigger pulse occurs before the specified number of pretrigger samples are acquired, the trigger pulse is ignored. Otherwise, when the ai/ReferenceTrigger pulse occurs, the sample counter value decrements until the specified number of posttrigger samples have been acquired.
Page 73: Using An Internal Source
Your DAQ device only acquires data during an acquisition. The device ignores ai/SampleClock when a measurement acquisition is not in progress. During a measurement acquisition, you can cause your DAQ device to ignore ai/SampleClock using the ai/PauseTrigger signal. © National Instruments Corporation 4-29 M Series User Manual...
Page 74: Ai Sample Clock Timebase Signal
Chapter 4 Analog Input A counter on your device internally generates ai/SampleClock unless you select some external source. ai/StartTrigger starts this counter and either software or hardware can stop it once a finite acquisition completes. When using an internally generated ai/SampleClock, you also can specify a configurable delay from ai/StartTrigger to the first ai/SampleClock pulse.
Page 75: Ai Convert Clock Signal
To explicitly specify the conversion rate, use AI Convert Clock Rate DAQmx Timing property node or function. Caution Setting the conversion rate higher than the maximum rate specified for your device will result in errors. © National Instruments Corporation 4-31 M Series User Manual...
Page 76: Using An Internal Source
Chapter 4 Analog Input Using an Internal Source One of the following internal signals can drive ai/ConvertClock: • AI Convert Clock Timebase (divided down) • Counter n Internal Output A programmable internal counter divides down the AI Convert Clock Timebase to generate ai/ConvertClock. The counter is started by ai/SampleClock and continues to count down to zero, produces an ai/ConvertClock, reloads itself, and repeats the process until the sample is finished.
Page 77: Other Timing Requirements
Figures 4-18, 4-19, 4-20, and 4-21 show timing sequences for a four-channel acquisition (using AI channels 0, 1, 2, and 3) and demonstrate proper and improper sequencing of ai/SampleClock and ai/ConvertClock. © National Instruments Corporation 4-33 M Series User Manual...
Page 78 Chapter 4 Analog Input ai/SampleClock ai/ConvertClock Channel Measured 1 2 3 1 2 3 1 2 3 Sample #1 Sample #2 Sample #3 • Sample Clock Too Fast for Convert Clock • Sample Clock Pulses are Gated Off Figure 4-18. ai/SampleClock Too Fast ai/SampleClock ai/ConvertClock 1 2 3...
Page 79: Ai Convert Clock Timebase Signal
Use one of the following signals as the source of ai/ConvertClockTimebase: • ai/SampleClockTimebase • 20 MHz Timebase ai/ConvertClockTimebase is not available as an output on the I/O connector. © National Instruments Corporation 4-35 M Series User Manual...
Page 80: Ai Hold Complete Event Signal
Chapter 4 Analog Input AI Hold Complete Event Signal The AI Hold Complete Event (ai/HoldCompleteEvent) signal generates a pulse after each A/D conversion begins. You can route ai/HoldCompleteEvent out to any PFI <0..15> or RTSI <0..7> terminal. The polarity of ai/HoldCompleteEvent is software-selectable, but is typically configured so that a low-to-high leading edge can clock external AI multiplexers indicating when the input signal has been sampled and can be removed.
Page 81: Using An Analog Source
(with some limitations) before the DAQ device discards it. Refer to the KnowledgeBase document, Can a Pretriggered Acquisition be Continuous?, for more information. To access this KnowledgeBase, go to and enter the info code ni.com/info rdcanq © National Instruments Corporation 4-37 M Series User Manual...
Page 82: Using A Digital Source
Chapter 4 Analog Input When the reference trigger occurs, the DAQ device continues to write samples to the buffer until the buffer contains the number of posttrigger samples desired. Figure 4-23 shows the final buffer. Reference Trigger Pretrigger Samples Posttrigger Samples Complete Buffer Figure 4-23.
Page 83: Ai Pause Trigger Signal
Routing AI Pause Trigger Signal to an Output Terminal You can route ai/PauseTrigger out to RTSI <0..7>. Note Pause triggers are only sensitive to the level of the source, not the edge. © National Instruments Corporation 4-39 M Series User Manual...
Page 84: Getting Started With Ai Applications In Software
Chapter 4 Analog Input Getting Started with AI Applications in Software You can use the M Series device in the following analog input applications. • Single-point analog input • Finite analog input • Continuous analog input You can perform these applications through DMA, interrupt, or programmed I/O data transfer mechanisms.
Page 85: Analog Output
It is a first-in-first-out (FIFO) memory buffer between the computer and the DACs. It allows you to download the points of a waveform to your M Series device without host computer interaction. © National Instruments Corporation M Series User Manual...
Page 86: Ao Offset And Ao Reference Selection
Chapter 5 Analog Output • AO Sample Clock—The AO Sample Clock signal reads a sample from the DAC FIFO and generates the AO voltage. • AO Offset and AO Reference Selection—AO offset and AO reference selection signals allow you to change the range of the analog outputs.
Page 87 You cannot route an AO channel to be its own reference. The AO reference can be a positive or negative voltage. If AO reference is a negative voltage, the polarity of the AO output is inverted. © National Instruments Corporation M Series User Manual...
Page 88: Minimizing Glitches On The Output Signal
Chapter 5 Analog Output Minimizing Glitches on the Output Signal When you use a DAC to generate a waveform, you may observe glitches on the output signal. These glitches are normal; when a DAC switches from one voltage to another, it produces glitches due to released charges. The largest glitches occur when the most significant bit of the DAC code changes.
Page 89: Non-Buffered
FIFO size. The advantage of using FIFO regeneration is that it does not require communication with the main host memory once the operation is started, thereby preventing any problems that may occur due to excessive bus traffic. © National Instruments Corporation M Series User Manual...
Page 90: Analog Output Triggering
Chapter 5 Analog Output With non-regeneration, old data will not be repeated. New data must be continually written to the buffer. If the program does not write new data to the buffer at a fast enough rate to keep up with the generation, the buffer will underflow and cause an error.
Page 91: Analog Output Timing Signals
Using a Digital Source To use ao/StartTrigger, specify a source and an edge. The source can be one of the following signals: • A pulse initiated by host software • PFI <0..15> • RTSI <0..7> © National Instruments Corporation M Series User Manual...
Page 92: Using An Analog Source
Chapter 5 Analog Output • ai/ReferenceTrigger • ai/StartTrigger • PXI_STAR The source also can be one of several internal signals on your DAQ device. Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW Help in version 8.0 or later for more information. You also can specify whether the waveform generation begins on the rising edge or falling edge of ao/StartTrigger.
Page 93: Using A Digital Source
Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW Help in version 8.0 or later for more information. You also can specify whether the samples are paused when ao/PauseTrigger is at a logic high or low level. © National Instruments Corporation M Series User Manual...
Page 94: Using An Analog Source
Chapter 5 Analog Output Using an Analog Source When you use an analog trigger source, the samples are paused when the Analog Comparison Event signal is at a high level. Refer to the Triggering with an Analog Source section of Chapter 11, Triggering, for more information.
Page 95: Other Timing Requirements
100 kHz Timebase • PXI_CLK10 • PFI <0..15> • RTSI <0..7> • PXI_STAR • Analog Comparison Event (an analog trigger) ao/SampleClockTimebase is not available as an output on the I/O connector. © National Instruments Corporation 5-11 M Series User Manual...
Page 96: Getting Started With Ao Applications In Software
Chapter 5 Analog Output You might use ao/SampleClockTimebase if you want to use an external sample clock signal, but need to divide the signal down. If you want to use an external sample clock signal, but do not need to divide the signal, then you should use ao/SampleClock rather than ao/SampleClockTimebase.
Page 97: Digital I/O
• DI change detection trigger/interrupt Figure 6-1 shows the circuitry of one DIO line. Each DIO line is similar. The following sections provide information about the various parts of the DIO circuit. © National Instruments Corporation M Series User Manual...
Page 98: Static Dio
Chapter 6 Digital I/O DO Waveform Generation FIFO DO Sample Clock Static DO Buffer P0. x I/O Protection DO. x Direction Control Weak Pull-Down Static DI DI Waveform Measurement FIFO DI Sample Clock DI Change Detection Figure 6-1. M Series Digital I/O Circuitry The DIO terminals are named P0.<0..31>...
Page 99: Digital Waveform Triggering
DMA controller dedicated to moving data from the DI waveform acquisition FIFO to system memory. The DAQ device samples the DIO lines on each rising or falling edge of a clock signal, di/SampleClock. © National Instruments Corporation M Series User Manual...
Page 100: Di Sample Clock Signal
Chapter 6 Digital I/O You can configure each DIO line to be an output, a static input, or a digital waveform acquisition input. DI Sample Clock Signal Use the DI Sample Clock (di/SampleClock) signal to sample the P0.<0..31> terminals and store the result in the DI waveform acquisition FIFO.
Page 101: Routing Di Sample Clock To An Output Terminal
DO Sample Clock or use an external signal as the source of the clock. If the DAQ device receives a do/SampleClock when the FIFO is empty, the DAQ device reports an underflow error to the host software. © National Instruments Corporation M Series User Manual...
Page 102: Using An Internal Source
Chapter 6 Digital I/O Using an Internal Source To use do/SampleClock with an internal source, specify the signal source and the polarity of the signal. The source can be any of the following signals: • AI Sample Clock • AI Convert Clock •...
Page 103: I/O Protection
When using your M Series device to control an SCXI chassis, DIO lines 0, 1, 2, and 4 are used as communication lines and must be left to power-up in the default high-impedance state to avoid potential damage to these signals. © National Instruments Corporation M Series User Manual...
Page 104: Di Change Detection
Chapter 6 Digital I/O DI Change Detection You can configure the DAQ device to detect changes in the DIO signals. Figure 6-3 shows a block diagram of the DIO change detection circuitry. Enable P0.0 Synch Enable Change Detection Event Enable P0.31 Synch Enable...
Page 105: Applications
TTL signals and sensing external device states, such as the state of the switch shown in the figure. Digital output applications include sending TTL signals and driving external devices, such as the LED shown in the figure. © National Instruments Corporation M Series User Manual...
Page 106: Getting Started With Dio Applications In Software
Chapter 6 Digital I/O +5 V P1.<4..7> TTL Signal P1.<0..3> +5 V Switch D GND I/O Connector M Series Device Figure 6-4. Digital I/O Connections Exceeding the maximum input voltage ratings, which are listed in the Caution specifications document for each M Series device, can damage the DAQ device and the computer.
Page 107: Counters
Counter 1 HW Arm Counter 1 A Counter 0 TC Counter 1 B (Counter 1 Up_Down) Counter 1 Z Input Selection Muxes Frequency Generator Frequency Output Timebase Freq Out Figure 7-1. M Series Counters © National Instruments Corporation M Series User Manual...
Page 108: Counter Input Applications
Chapter 7 Counters The counters have seven input signals, although in most applications only a few inputs are used. For information about connecting counter signals, refer to the Default Counter/Timer Pinouts section. Counter Input Applications Counting Edges In edge counting applications, the counter counts edges on its Source after the counter is armed.
Page 109: Buffered (Sample Clock) Edge Counting
Gate. Counter Armed Sample Clock (Sample on Rising Edge) SOURCE Counter Value Buffer Figure 7-4. Buffered (Sample Clock) Edge Counting © National Instruments Corporation M Series User Manual...
Page 110: Controlling The Direction Of Counting
Chapter 7 Counters Controlling the Direction of Counting In edge counting applications, the counter can count up or down. You can configure the counter to do the following: • Always count up • Always count down • Count up when the Counter n B input is high; count down when it is For information about connecting counter signals, refer to the Default Counter/Timer Pinouts...
Page 111: Buffered Pulse-Width Measurement
Note that if you are using an external signal as the Source, at least one Source pulse should occur between each active edge of the Gate signal. This condition ensures that correct values are returned by the counter. If this © National Instruments Corporation M Series User Manual...
Page 112: Period Measurement
Chapter 7 Counters condition is not met, consider using duplicate count prevention, described in the Duplicate Count Prevention section. For information about connecting counter signals, refer to the Default Counter/Timer Pinouts section. Period Measurement In period measurements, the counter measures a period on its Gate input signal after the counter is armed.
Page 113: Buffered Period Measurement
This condition ensures that correct values are returned by the counter. If this condition is not met, consider using duplicate count prevention, described in the Duplicate Count Prevention section. For information about connecting counter signals, refer to the Default Counter/Timer Pinouts section. © National Instruments Corporation M Series User Manual...
Page 114: Semi-Period Measurement
Chapter 7 Counters Semi-Period Measurement In semi-period measurements, the counter measures a semi-period on its Gate input signal after the counter is armed. A semi-period is the time between any two consecutive edges on the Gate input. You can route an internal or external periodic clock signal (with a known period) to the Source input of the counter.
Page 115: Frequency Measurement
F1 is the inverse of the period. Figure 7-10 illustrates this method. Interval Measured Gate … … Source Single Period Period of F1 = Measurement Frequency of F1 = Figure 7-10. Method 1 © National Instruments Corporation M Series User Manual...
Page 116: Method 1B-Measure Low Frequency With One Counter (Averaged)
Chapter 7 Counters Method 1b—Measure Low Frequency with One Counter (Averaged) In this method, you measure several periods of your signal using a known timebase. This method is good for low to medium frequency signals. You can route the signal to measure (F1) to the Gate of a counter. You can route a known timebase (Ft) to the Source of the counter.
Page 117: Method 2-Measure High Frequency With Two Counters
Width of Pulse (T) Pulse Pulse Gate … Source Pulse-Width Width of Measurement Pulse Frequency of F1 = Figure 7-12. Method 2 © National Instruments Corporation 7-11 M Series User Manual...
Page 118: Method 3-Measure Large Range Of Frequencies Using Two Counters
Chapter 7 Counters Method 3—Measure Large Range of Frequencies Using Two Counters By using two counters, you can accurately measure a signal that might be high or low frequency. This technique is called reciprocal frequency measurement. In this method, you generate a long pulse using the signal to measure.
Page 119: Choosing A Method For Measuring Frequency
Method 2 is accurate for high frequency signals. However, the accuracy decreases as the frequency of the signal to measure decreases. At very low frequencies, Method 2 may be too inaccurate © National Instruments Corporation 7-13 M Series User Manual...
Page 120: Position Measurement
Chapter 7 Counters for your application. Another disadvantage of Method 2 is that it requires two counters (if you cannot provide an external signal of known width). An advantage of Method 2 is that the measurement completes in a known amount of time. •...
Page 121 A and B for X4 encoding. Whether the counter increments or decrements depends on which channel leads the other. Each cycle results in four increments or decrements, as shown in Figure 7-16. © National Instruments Corporation 7-15 M Series User Manual...
Page 122 Chapter 7 Counters Ch A Ch B Counter Value Figure 7-16. X4 Encoding Channel Z Behavior Some quadrature encoders have a third channel, channel Z, which is also referred to as the index channel. A high level on channel Z causes the counter to be reloaded with a specified value in a specified phase of the quadrature cycle.
Page 123: Measurements Using Two Pulse Encoders
Use this type of measurement to count events or measure the time that occurs between edges on two signals. This type of measurement is sometimes referred to as start/stop trigger measurement, second gate measurement, or A-to-B measurement. © National Instruments Corporation 7-17 M Series User Manual...
Page 124: Single Two-Signal Edge-Separation Measurement
Chapter 7 Counters Single Two-Signal Edge-Separation Measurement With single two-signal edge-separation measurement, the counter counts the number of rising (or falling) edges on the Source input occurring between an active edge of the Gate signal and an active edge of the Aux signal.
Page 125: Counter Output Applications
You can specify a pulse width. The pulse width is also measured in terms of a number of active edges of the Source input. You also can specify the active edge of the Source input (rising or falling). © National Instruments Corporation 7-19 M Series User Manual...
Page 126: Single Pulse Generation With Start Trigger
Chapter 7 Counters Figure 7-21 shows a generation of a pulse with a pulse delay of four and a pulse width of three (using the rising edge of Source). Counter Armed SOURCE Figure 7-21. Single Pulse Generation Single Pulse Generation with Start Trigger The counter can output a single pulse in response to one pulse on a hardware Start Trigger signal.
Page 127: Retriggerable Single Pulse Generation
Source input. You specify the high and low pulse widths of the output signal. The pulse widths are also measured in terms of a number of active edges of the Source © National Instruments Corporation 7-21 M Series User Manual...
Page 128: Frequency Generation
Chapter 7 Counters input. You also can specify the active edge of the Source input (rising or falling). The counter can begin the pulse train generation as soon as the counter is armed, or in response to a hardware Start Trigger. You can route the Start Trigger to the Gate input of the counter.
Page 129 In software, program the frequency generator as you would program one of the counters for pulse train generation. For information about connecting counter signals, refer to the Default Counter/Timer Pinouts section. © National Instruments Corporation 7-23 M Series User Manual...
Page 130: Frequency Division
Chapter 7 Counters Frequency Division The counters can generate a signal with a frequency that is a fraction of an input signal. This function is equivalent to continuous pulse train generation. For information about connecting counter signals, refer to the Default Counter/Timer Pinouts section.
Page 131: Counter Timing Signals
In this section, n refers to either Counter 0 or 1. For example, Counter n Source refers to two signals—Counter 0 Source (the source input to Counter 0) and Counter 1 Source (the source input to Counter 1). © National Instruments Corporation 7-25 M Series User Manual...
Page 132: Counter N Source Signal
Chapter 7 Counters Counter n Source Signal The selected edge of the Counter n Source signal increments and decrements the counter value depending on the application the counter is performing. Table 7-3 lists how this terminal is used in various applications.
Page 133: Routing Counter N Source To An Output Terminal
Routing Counter n Gate to an Output Terminal You can route Counter n Gate out to any PFI <0..15> or RTSI <0..7> terminal. All PFIs are set to high-impedance at startup. © National Instruments Corporation 7-27 M Series User Manual...
Page 134: Counter N Aux Signal
Chapter 7 Counters Counter n Aux Signal The Counter n Aux signal indicates the first edge in a two-signal edge-separation measurement. Routing a Signal to Counter n Aux Each counter has independent input selectors for the Counter n Aux signal. Any of the following signals can be routed to the Counter n Aux input.
Page 135: Counter N Up_Down Signal
The Counter n Internal Output signal changes in response to Counter n TC. The two software-selectable output options are pulse output on TC and toggle output on TC. The output polarity is software-selectable for both options. © National Instruments Corporation 7-29 M Series User Manual...
Page 136: Routing Counter N Internal Output To An Output Terminal
Chapter 7 Counters With pulse or pulse train generation tasks, the counter drives the pulse(s) on the Counter n Internal Output signal. The Counter n Internal Output signal can be internally routed to be a counter/timer input or an “external” source for AI, AO, DI, or DO timing signals.
Page 137: Counter Triggering
HW Arm input of the counter. For counter output operations, you can use it in addition to the start and pause triggers. For counter input operations, you can use the arm start © National Instruments Corporation 7-31 M Series User Manual...
Page 138: Start Trigger
Chapter 7 Counters trigger to have start trigger-like behavior. The arm start trigger can be used for synchronizing multiple counter input and output tasks. When using an arm start trigger, the arm start trigger source is routed to the Counter n HW Arm signal. Start Trigger For counter output operations, a start trigger can be configured to begin a finite or continuous pulse generation.
Page 139: Other Counter Features
Filter Setting Pass Signal) Pass Filter Not Pass Filter 125 ns 125 ns 100 ns 6.425 µs 6.425 µs 6.400 µs 2.56 ms ~101,800 2.56 ms 2.54 ms Disabled — — — © National Instruments Corporation 7-33 M Series User Manual...
Page 140: Prescaling
Chapter 7 Counters The filter setting for each input can be configured independently. On power up, the filters are disabled. Figure 7-28 shows an example of a low to high transition on an input that has its filter set to 125 ns (N = 5). RTSI, PFI, or Filtered input goes PXI_STAR Terminal...
Page 141: Duplicate Count Prevention
On the first rising edge of the Gate, the current count of 7 is stored. On the next rising edge of the Gate, the counter stores a 2 since two Source pulses occurred after the previous rising edge of Gate. © National Instruments Corporation 7-35 M Series User Manual...
Page 142: Example Application That Works Incorrectly (Duplicate Counting)
Chapter 7 Counters The counter synchronizes or samples the Gate signal with the Source signal, so the counter does not detect a rising edge in the Gate until the next Source pulse. In this example, the counter stores the values in the buffer on the first rising Source edge after the rising edge of Gate.
Page 143: When To Use Duplicate Count Prevention
The frequency of the external source is 20 MHz or less. • You can have the counter value and output to change synchronously with the 80 MHz Timebase. In all other cases, you should not use duplicate count prevention. © National Instruments Corporation 7-37 M Series User Manual...
Page 144: Enabling Duplicate Count Prevention In Ni-Daqmx
Chapter 7 Counters Enabling Duplicate Count Prevention in NI-DAQmx You can enable duplicate count prevention in NI-DAQmx by setting the Enable Duplicate Count Prevention attribute/property. For specific information about finding the Enable Duplicate Count Prevention attribute/property, refer to the help file for the API you are using. Synchronization Modes The 32-bit counter counts up or down synchronously with the Source signal.
Page 145: 80 Mhz Source Mode
Source signal, and counts on the following rising edge of the source, as shown in Figure 7-35. Source Synchronize Delayed Source Count Figure 7-35. External Source Mode © National Instruments Corporation 7-39 M Series User Manual...
Page 146: Pfi
PFI line. Each PFI line is similar. Timing Signals Static DO Buffer I/O Protection PFI x/P1/P2 Direction Control Static DI Weak Pull-Down To Input Timing Signal Selectors Filters Figure 8-1. M Series PFI Circuitry © National Instruments Corporation M Series User Manual...
Page 147: Using Pfi Terminals As Timing Input Signals
Chapter 8 When a terminal is used as a timing input or output signal, it is called PFI x (where x is an integer from 0 to 15). When a terminal is used as a static digital input or output, it is called P1.x or P2.x. On the I/O connector, each terminal is labeled PFI x/P1 or PFI x/P2.
Page 148: Exporting Timing Output Signals Using Pfi Terminals
P1.x or P2.x. On the I/O connector, each terminal is labeled PFI x/P1.x or PFI x/P2.x. In addition, M Series devices have up to 32 lines of bidirectional DIO signals. © National Instruments Corporation M Series User Manual...
Page 149: Connecting Pfi Input Signals
Chapter 8 Connecting PFI Input Signals All PFI input connections are referenced to D GND. Figure 8-2 shows this reference, and how to connect an external PFI 0 source and an external PFI 2 source to two PFI terminals. PFI 0 PFI 2 PFI 0 PFI 2...
Page 150 Refer to the KnowledgeBase document, Digital Filtering with M Series, for more information about digital filters and counters. To access this KnowledgeBase, go to and enter the info code ni.com/info rddfms © National Instruments Corporation M Series User Manual...
Page 151: I/O Protection
Chapter 8 I/O Protection Each DIO and PFI signal is protected against overvoltage, undervoltage, and overcurrent conditions as well as ESD events. However, you should avoid these fault conditions by following these guidelines. • If you configure a PFI or DIO line as an output, do not connect it to any external signal source, ground signal, or power supply.
Page 152: Digital Routing And Clock Generation
÷ 8 80 MHz Output Selectors) Oscillator External 80 MHz Timebase Reference RTSI <0..7> Clock ÷ PXI_CLK10 20 MHz Timebase PXI_STAR ÷ 100 kHz Timebase Figure 9-1. M Series Clock Routing Circuitry © National Instruments Corporation M Series User Manual...
Page 153: 80 Mhz Timebase
Chapter 9 Digital Routing and Clock Generation 80 MHz Timebase The 80 MHz Timebase can be used as the Source input to the 32-bit general-purpose counter/timers. The 80 MHz Timebase is generated from the following sources. • Onboard oscillator • External signal (by using the external reference clock) 20 MHz Timebase The 20 MHz Timebase normally generates many of the AI and AO timing...
Page 154: 10 Mhz Reference Clock
Once all of the devices are using or referencing a common timebase, you can synchronize operations across them by sending a common start trigger out across the RTSI bus and setting their sample clock rates to the same value. © National Instruments Corporation M Series User Manual...
Page 155: Real-Time System Integration (Rtsi)
Use a common clock (or timebase) to drive the timing engine on multiple devices • Share trigger signals between devices Many National Instruments DAQ, motion, vision, and CAN devices support RTSI. Note RTSI is not supported on USB devices. In a PCI system, the RTSI bus consists of the RTSI bus interface and a ribbon cable.
Page 156 RTSI 5 RTSI 4 RTSI 3 RTSI 2 RTSI 1 RTSI 0 Not Connected. Do not connect 1–18 signals to these terminals. D GND 19, 21, 23, 25, 27, 29, 31, 33 © National Instruments Corporation M Series User Manual...
Page 157: Using Rtsi As Outputs
Chapter 9 Digital Routing and Clock Generation Using RTSI as Outputs RTSI <0..7> are bidirectional terminals. As an output, you can drive any of the following signals to any RTSI terminal: • ai/StartTrigger • ai/ReferenceTrigger • ai/ConvertClock* • ai/SampleClock • ai/PauseTrigger •...
Page 158: Rtsi Filters
The filter setting for each input can be configured independently. On power up, the filters are disabled. Figure 9-3 shows an example of a low to high transition on an input that has its filter set to 125 ns (N = 5). © National Instruments Corporation M Series User Manual...
Page 159: Pxi Clock And Trigger Signals
Chapter 9 Digital Routing and Clock Generation RTSI, PFI, or Filtered input goes PXI_STAR Terminal high when terminal is sampled high on Filter Clock five consecutive filter (40 MHz) clocks. Filtered Input Figure 9-3. Filter Example Enabling filters introduces jitter on the input signal. For the 125 ns and 6.425 µs filter settings, the jitter is up to 25 ns.
Page 160: Pxi_Star Trigger
N consecutive edges, the low to high transition is propagated to the rest of the circuit. The value of N depends on the filter setting; refer to Table 9-3. © National Instruments Corporation M Series User Manual...
Page 161 Chapter 9 Digital Routing and Clock Generation Table 9-3. Filters N (Filter Clocks Pulse Width Pulse Width Needed to Guaranteed to Guaranteed to Filter Setting Pass Signal) Pass Filter Not Pass Filter 125 ns 125 ns 100 ns 6.425 µs 6.425 µs 6.400 µs 2.56 ms...
Page 162: Bus Interface
Each DMA controller channel contains a FIFO and independent processes for filling and emptying the FIFO. This allows the buses involved in the transfer to operate independently for maximum performance. Data is © National Instruments Corporation 10-1 M Series User Manual...
Page 163: Pxi Considerations
Chapter 10 Bus Interface transferred simultaneously between the ports. The DMA controller supports burst transfers to and from the FIFO. Each DMA controller supports several features to optimize PCI/PXI bus utilization. The DMA controllers pack and unpack data through the FIFOs. This feature allows the DMA controllers to combine multiple 16-bit transfers to the DAQ circuitry into a single 32-bit burst transfer on PCI.
Page 164: Using Pxi With Compactpci
For some PXI M Series devices, there are two variants—one that will work in PXI hybrid slots and one that supports local bus for SCXI control when the device is in the right-most slot. Refer to the device specifications for more information. © National Instruments Corporation 10-3...
Page 165: Data Transfer Methods
Chapter 10 Bus Interface compatible as long as those terminals on the sub-bus are disabled by default and never enabled. Caution Damage can result if these lines are driven by the sub-bus. NI is not liable for any damage resulting from improper signal connections. Data Transfer Methods The three primary ways to transfer data across (NI PCI/PCIe/PXI/PXIe Devices)
Page 166: Changing Data Transfer Methods
I/O; otherwise the driver returns an error. To change your data transfer mechanism between USB Signal Stream and programmed I/O, use the Data Transfer Mechanism property node function in NI-DAQmx. © National Instruments Corporation 10-5 M Series User Manual...
Page 167: Triggering With A Digital Source
A rising edge is a transition from a low logic level to a high logic level. A falling edge is a high to low transition. Figure 11-1 shows a falling-edge trigger. Digital Trigger Falling Edge Initiates Acquisition Figure 11-1. Falling-Edge Trigger © National Instruments Corporation 11-1 M Series User Manual...
Page 168: Triggering With An Analog Source
Chapter 11 Triggering You also can program your DAQ device to perform an action in response to a trigger from a digital source. The action can affect the following: • Analog input acquisition • Analog output generation • Counter behavior •...
Page 169: Analog Input Channels
You can route Analog Comparison Event out to any PFI <0..15> or RTSI <0..7> terminal. Analog Trigger Types Configure the analog trigger circuitry to different triggering modes—analog edge triggering, analog edge triggering with hysteresis, or analog window triggering. © National Instruments Corporation 11-3 M Series User Manual...
Page 170: Analog Edge Triggering
Chapter 11 Triggering Analog Edge Triggering Configure the analog trigger circuitry to detect when the analog signal is below or above a level you specify. In below-level analog triggering mode, shown in Figure 11-3, the trigger is generated when the signal value is less than Level. Level Analog Comparison Event Figure 11-3.
Page 171: Analog Edge Trigger With Hysteresis (Rising Slope)
The trigger stays asserted until the signal returns above the high threshold. The output of the trigger detection circuitry is the internal Analog Comparison Event signal, as shown in Figure 11-6. © National Instruments Corporation 11-5 M Series User Manual...
Page 172: Analog Window Triggering
Chapter 11 Triggering First signal must go above high threshold High threshold (Level + Hysteresis) Hysteresis Low threshold (Level) Then signal must go below low threshold before Analog Comparison Event asserts Analog Comparison Event Figure 11-6. Analog Edge Triggering with Hysteresis Falling Slope Example Analog Window Triggering An analog window trigger occurs when an analog signal either passes into (enters) or passes out of (leaves) a window defined by two voltage levels.
Page 173: Analog Trigger Accuracy
Comparing the observed results against the expected results, you can calculate the necessary offsets to apply in software to fine-tune the desired triggering behavior. © National Instruments Corporation 11-7 M Series User Manual...
Page 174 • NI 6254 • NI 6255 • NI 6259 • NI 6280 • NI 6281 • NI 6284 • NI 6289 To obtain documentation for devices not listed here, refer to ni.com/manuals © National Instruments Corporation M Series User Manual...
Page 175 Appendix A Device-Specific Information NI 6220 PCI/PXI-6220 Pinout Figure A-1 shows the pinout of the PCI/PXI-6220. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names.
Page 176: Figure A-1. Pci/Pxi-6220 Pinout
PFI 13/P2.5 PFI 5/P1.5 PFI 15/P2.7 PFI 6/P1.6 PFI 7/P1.7 D GND PFI 8/P2.0 PFI 9/P2.1 D GND PFI 12/P2.4 D GND PFI 14/P2.6 NC = No Connect Figure A-1. PCI/PXI-6220 Pinout © National Instruments Corporation M Series User Manual...
Page 177 Appendix A Device-Specific Information Table A-1. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 178 • BNC-2120—Similar to the BNC-2110, and also has a built-in function generator, quadrature encoder, temperature reference, and thermocouple connector • BNC-2090A—Desktop/rack-mountable device with 22 BNCs for connecting analog, digital, and timing signals © National Instruments Corporation M Series User Manual...
Page 179 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 180 M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation M Series User Manual...
Page 181: Figure A-2. Pci/Pxi-6221 (68-Pin) Pinout
Appendix A Device-Specific Information 68 34 AI 0 AI 8 67 33 AI GND AI 1 66 32 AI 9 AI GND 65 31 AI 2 AI 10 64 30 AI GND AI 3 63 29 AI 11 AI GND 62 28 AI SENSE AI 4...
Page 182 Options This section describes some cable and accessory options for M Series devices with one 68-pin connector, such as the PCI/PXI-6221 (68-pin). Refer to for other accessory options including new devices. ni.com © National Instruments Corporation M Series User Manual...
Page 183 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. You also can use an M Series device to control the SCXI section of a PXI/SCXI combination chassis, such as the PXI-1010 or PXI-1011.
Page 184 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 185 Appendix A Device-Specific Information PCI-6221 (37-Pin) PCI-6221 (37-Pin) Pinout Figure A-3 shows the pinout of the PCI-6221 (37-pin) device. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information.
Page 186 PCI-6221 (37-pin) device. PCI-6221 (37-Pin) Accessory and Cabling Options This section describes some cable and accessory options for the PCI-6221 (37-pin) device. Refer to for other accessory options including new ni.com devices. © National Instruments Corporation A-13 M Series User Manual...
Page 187 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SH37F-37M cable to connect a PCI-6221 (37-pin) device to a connector block, such as the following: • CB-37FH—DIN-mountable connector block with 37 screw terminals •...
Page 188: Figure A-4. Usb-6221 Screw Terminal Pinout
Figure A-4. USB-6221 Screw Terminal Pinout Table A-4. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 81 (PFI 8) CTR 0 GATE 83 (PFI 9) CTR 0 AUX 85 (PFI 10) © National Instruments Corporation A-15 M Series User Manual...
Page 189 Appendix A Device-Specific Information Table A-4. Default NI-DAQmx Counter/Timer Pins (Continued) Counter/Timer Signal Default Pin Number (Name) CTR 0 OUT 89 (PFI 12) CTR 0 A 81 (PFI 8) CTR 0 Z 83 (PFI 9) CTR 0 B 85 (PFI 10) CTR 1 SRC 76 (PFI 3) CTR 1 GATE...
Page 190 Figure A-5 shows the pinout of the USB-6221 BNC. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. © National Instruments Corporation A-17 M Series User Manual...
Page 191: Figure A-5. Usb-6221 Bnc Top Panel And Pinout
Appendix A Device-Specific Information Figure A-5. USB-6221 BNC Top Panel and Pinout M Series User Manual A-18 ni.com...
Page 192 To connect differential signals, determine the type of signal source you are using—a floating signal (FS) source or a ground-referenced signal (GS) source. Refer to the Connecting Analog Input Signals section of Chapter 4, Analog Input, for more information. © National Instruments Corporation A-19 M Series User Manual...
Page 193 Appendix A Device-Specific Information To measure a floating signal source, move the switch to the FS position. To measure a ground-referenced signal source, move the switch to the GS position. Figure A-6 shows the AI 0 BNC and corresponding FS/GS switch on the top panel of the USB-6221 BNC.
Page 194 AO 1. Figure A-9 shows the analog output circuitry on the USB-6221 BNC. AO x AO GND Figure A-9. Analog Output Circuitry Refer to the Connecting Analog Output Signals section of Chapter 5, Analog Output, for more information. © National Instruments Corporation A-21 M Series User Manual...
Page 195 Appendix A Device-Specific Information Digital I/O and Timing I/O You can access digital I/O and timing I/O signals on the BNC connectors labeled PFI <0..7>/P1.<0..7>. Figure A-10 shows the DIO/TIO circuitry on the USB-6221 BNC. PFI x /P1. x D GND Figure A-10.
Page 196 Information, for information about the USB-6221 BNC LEDs. USB-6221 BNC Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3, Connector and LED Information, for information about the replacing the fuse on the USB-6221 BNC. © National Instruments Corporation A-23 M Series User Manual...
Page 197 Appendix A Device-Specific Information NI 6224 PCI/PXI-6224 Pinout Figure A-13 shows the pinout of the PCI/PXI-6224. The I/O signals appear on two 68-pin connectors. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information.
Page 198: Figure A-13. Pci/Pxi-6224 Pinout
AI 17 33 67 AI GND D GND PFI 14/P2.6 AI 24 34 68 AI 16 NC = No Connect NC = No Connect NC = No Connect Figure A-13. PCI/PXI-6224 Pinout © National Instruments Corporation A-25 M Series User Manual...
Page 199 Appendix A Device-Specific Information Table A-6. Default NI-DAQmx Counter/Timer Pins Default Connector 0 Pin Number Counter/Timer Signal (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 200 • BNC-2111—Provides BNC connectivity to 16 single-ended analog input signals, two analog output signals, five DIO/PFI signals, and the external reference voltage for analog output © National Instruments Corporation A-27 M Series User Manual...
Page 201 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 202 Chapter 2, DAQ System Overview, for more information about custom cabling solutions. NI recommends that you use the SHC68-68-EPM cable; however, an SHC68-68-EP cable will work with M Series devices. © National Instruments Corporation A-29 M Series User Manual...
Page 203 Appendix A Device-Specific Information NI 6225 The following sections contain information about the PCI/PXI-6225, USB-6225 Screw Terminal, and USB-6225 Mass Termination devices. PCI/PXI-6225 PCI/PXI-6225 Pinout Figure A-14 shows the pinout of the PCI/PXI-6225. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3,...
Page 204: Figure A-14. Pci/Pxi-6225 Pinout
AI 18 AI 26 33 67 D GND PFI 12/P2.4 AI 17 AI 25 34 68 D GND PFI 14/P2.6 AI 24 AI 16 NC = No Connect Figure A-14. PCI/PXI-6225 Pinout © National Instruments Corporation A-31 M Series User Manual...
Page 205 Appendix A Device-Specific Information Table A-7. Default NI-DAQmx Counter/Timer Pins Default Connector 0 Pin Number Counter/Timer Signal (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 206 BNC-2120—Similar to the BNC-2110, and also has a built-in function generator, quadrature encoder, temperature reference, and thermocouple connector • BNC-2090A—Desktop/rack-mountable device with 22 BNCs for connecting analog, digital, and timing signals © National Instruments Corporation A-33 M Series User Manual...
Page 207 BNC connectivity to 24 of the differential (48 single ended) analog input signals on Connector 1. You can use an SHC68-68 cable to connect to the BNC-2115. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks such as: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 208 Chapter 2, DAQ System Overview, for more information about custom cabling solutions. NI recommends that you use the SHC68-68-EPM cable; however, an SHC68-68-EP cable will work with M Series devices. © National Instruments Corporation A-35 M Series User Manual...
Page 209 Appendix A Device-Specific Information USB-6225 Screw Terminal USB-6225 Screw Terminal Pinout Figure A-15 shows the pinout of the USB-6225 Screw Terminal. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information.
Page 210: Figure A-15. Usb-6225 Screw Terminal Pinout
PFI 5/P1.5 AI 78 PFI 15/P2.7 AI 70 PFI 6/P1.6 AI 79 +5 V AI 71 PFI 7/P1.7 NC = No Connect Chassis Ground Lug Figure A-15. USB-6225 Screw Terminal Pinout © National Instruments Corporation A-37 M Series User Manual...
Page 211 Appendix A Device-Specific Information Table A-8. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 113 (PFI 8) CTR 0 GATE 115 (PFI 9) CTR 0 AUX 117 (PFI 10) CTR 0 OUT 121 (PFI 12) CTR 0 A 113 (PFI 8) CTR 0 Z...
Page 212 M Series devices may be used with most E Series accessories. However, some E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-39 M Series User Manual...
Page 213: Figure A-16. Usb-6225 Mass Termination Pinout
Appendix A Device-Specific Information AI 24 AI 16 AI 8 AI 0 AI 17 AI 25 AI 1 AI GND AI 18 AI 26 AI GND AI 9 AI 27 AI 19 AI 10 AI 2 AI 20 AI 28 AI 3 AI GND AI 21...
Page 214 This section describes some cable and accessory options for M Series devices with two 68-pin connectors, such as the USB-6225 Mass Termination device. Refer to for other accessory options including ni.com new devices. © National Instruments Corporation A-41 M Series User Manual...
Page 215 Appendix A Device-Specific Information SCC Accessories SCC provides portable, modular signal conditioning to your DAQ system. To connect your M Series device to an SCC module carrier, such as the SC-2345, SC-2350, or SCC-68, use an SH68-68-EP shielded cable. Use Connector 0 of your M Series device to control an SCC module carrier. Connector 1 cannot be used with SCCs.
Page 216 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SH68-68-EP shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 217 Appendix A Device-Specific Information Custom Cabling and Connectivity The CA-1000 is a configurable enclosure that gives user-defined connectivity and flexibility through customized panelettes. Visit ni.com for more information about the CA-1000. Refer to the Custom Cabling section of Chapter 2, DAQ System Overview, for more information about custom cabling solutions.
Page 218 M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-45 M Series User Manual...
Page 219: Figure A-17. Pci/Pxi-6229 Pinout
Appendix A Device-Specific Information 68 34 AI 8 AI 0 P0.30 D GND AI GND 67 33 AI 1 P0.28 D GND AI 9 66 32 AI GND P0.25 P0.24 AI 2 65 31 AI 10 D GND P0.23 AI GND 64 30 AI 3 P0.22...
Page 220 PCI/PXI-6229 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68-pin connectors, such as the PCI/PXI-6229. Refer to for other accessory options including new devices. ni.com © National Instruments Corporation A-47 M Series User Manual...
Page 221 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. Use Connector 0 of your M Series device to control SCXI. NI-DAQ 7.4 and later supports SCXI in parallel mode on Connector 1.
Page 222 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 223 Appendix A Device-Specific Information Cables In most applications, you can use the following cables: • SHC68-68-EPM —High-performance cable designed specifically for M Series devices. It has individual bundles separating analog and digital signals. Each differential analog input channel is routed on an individually shielded twisted pair of wires.
Page 224 Figure A-18 shows the pinout of the USB-6229 Screw Terminal. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. © National Instruments Corporation A-51 M Series User Manual...
Page 225: Figure A-18. Usb-6229 Screw Terminal Pinout
Appendix A Device-Specific Information AI 4 AI 20 AI 0 AI 16 AI 12 AI 28 AI 8 AI 24 AI GND AI GND AI GND AI GND AI 5 AI 21 AI 1 AI 17 AI 13 AI 29 AI 9 AI 25 AI GND...
Page 226 USB-6229 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3, Connector and LED Information, for information about the replacing the fuse on the USB-6229 Screw Terminal. © National Instruments Corporation A-53 M Series User Manual...
Page 227 Appendix A Device-Specific Information USB-6229 BNC USB-6229 BNC Pinout Figure A-19 shows the pinout of the USB-6229 BNC. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. M Series User Manual A-54 ni.com...
Page 228: Figure A-19. Usb-6229 Bnc Top Panel And Pinout
Appendix A Device-Specific Information Figure A-19. USB-6229 BNC Top Panel and Pinout © National Instruments Corporation A-55 M Series User Manual...
Page 229 Appendix A Device-Specific Information Table A-12. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Name CTR 0 SRC PFI 8 CTR 0 GATE PFI 9 CTR 0 AUX PFI 10 CTR 0 OUT PFI 12 CTR 0 A PFI 8 CTR 0 Z PFI 9 CTR 0 B...
Page 230 GS position. This setting disconnects the built-in ground reference resistor from the negative terminal of the BNC connector, allowing the connector to be used as a single-ended channel, as shown in Figure A-22. © National Instruments Corporation A-57 M Series User Manual...
Page 231 Appendix A Device-Specific Information AI x AI x+8 – Ground Ref. Source (GS) USB-62xx BNC Device Figure A-22. Single-Ended Channels When you set the source type to the GS position and software-configure the device for single-ended input, each BNC connector provides access to two single-ended channels, AI x and AI x+8.
Page 232 USER 2 D GND +5 V D GND P0.0 P0.1 Screw P0.2 Terminal P0.3 Block D GND P0.4 P0.5 P0.6 P0.7 D GND PFI 8/P2.0 Figure A-25. USER <1..2> BNC Connections © National Instruments Corporation A-59 M Series User Manual...
Page 233 Appendix A Device-Specific Information Figure A-26 shows an example of how to use the USER 1 and USER 2 BNCs. To access the PFI 8 signal from a BNC, connect USER 1 on the screw terminal block to PFI 8 with a wire. USER 1 BNC Internal BNC Cable...
Page 234 M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-61 M Series User Manual...
Page 235: Figure A-27. Pci/Pxi-6250 Pinout
Appendix A Device-Specific Information 68 34 AI 0 AI 8 67 33 AI GND AI 1 66 32 AI 9 AI GND 65 31 AI 2 AI 10 64 30 AI GND AI 3 63 29 AI 11 AI GND 62 28 AI SENSE AI 4...
Page 236 PCI/PXI-6250 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68-pin connector, such as the PCI/PXI-6250. Refer to for other accessory options including new devices. ni.com © National Instruments Corporation A-63 M Series User Manual...
Page 237 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. You also can use an M Series device to control the SCXI section of a PXI/SCXI combination chassis, such as the PXI-1010 or PXI-1011.
Page 238 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 239 Appendix A Device-Specific Information NI 6251 The following sections contain information about the NI PCI/PCIe/PXI/PXIe-6251, USB-6251 Screw Terminal, USB-6251 BNC, and USB-6251 Mass Termination devices. NI PCI/PCIe/PXI/PXIe-6251 NI PCI/PCIe/PXI/PXIe-6251 Pinout Figure A-28 shows the pinout of the NI PCI/PCIe/PXI/PXIe-6251. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3,...
Page 240: Figure A-28. Ni Pci/Pcie/Pxi/Pxie-6251 Pinout
D GND PFI 13/P2.5 PFI 5/P1.5 PFI 15/P2.7 PFI 6/P1.6 PFI 7/P1.7 D GND PFI 8/P2.0 PFI 9/P2.1 D GND PFI 12/P2.4 D GND PFI 14/P2.6 Figure A-28. NI PCI/PCIe/PXI/PXIe-6251 Pinout © National Instruments Corporation A-67 M Series User Manual...
Page 241 Appendix A Device-Specific Information Table A-14. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 242 BNC-2120—Similar to the BNC-2110, and also has a built-in function generator, quadrature encoder, temperature reference, and thermocouple connector • BNC-2090A—Desktop/rack-mountable device with 22 BNCs for connecting analog, digital, and timing signals © National Instruments Corporation A-69 M Series User Manual...
Page 243 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 244: Figure A-29. Usb-6251 Screw Terminal Pinout
PFI 4/P1.4 AI GND D GND AI GND PFI 5/P1.5 AO 1 PFI 15/P2.7 AO 0 PFI 6/P1.6 AO GND +5 V AO GND PFI 7/P1.7 Figure A-29. USB-6251 Screw Terminal Pinout © National Instruments Corporation A-71 M Series User Manual...
Page 245 Appendix A Device-Specific Information Table A-15. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 81 (PFI 8) CTR 0 GATE 83 (PFI 9) CTR 0 AUX 85 (PFI 10) CTR 0 OUT 89 (PFI 12) CTR 0 A 81 (PFI 8) CTR 0 Z...
Page 246 Figure A-30 shows the pinout of the USB-6251 BNC. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. © National Instruments Corporation A-73 M Series User Manual...
Page 247: Figure A-30. Usb-6251 Bnc Top Panel And Pinout
Appendix A Device-Specific Information Figure A-30. USB-6251 BNC Top Panel and Pinout M Series User Manual A-74 ni.com...
Page 248 To connect differential signals, determine the type of signal source you are using—a floating signal (FS) source or a ground-referenced signal (GS) source. Refer to the Connecting Analog Input Signals section of Chapter 4, Analog Input, for more information. © National Instruments Corporation A-75 M Series User Manual...
Page 249 Appendix A Device-Specific Information To measure a floating signal source, move the switch to the FS position. To measure a ground-referenced signal source, move the switch to the GS position. Figure A-31 shows the AI 0 BNC and corresponding FS/GS switch on the top panel of the USB-6251 BNC.
Page 250 AO 1. Figure A-34 shows the analog output circuitry on the USB-6251 BNC. AO x AO GND Figure A-34. Analog Output Circuitry Refer to the Connecting Analog Output Signals section of Chapter 5, Analog Output, for more information. © National Instruments Corporation A-77 M Series User Manual...
Page 251 Appendix A Device-Specific Information Digital I/O and Timing I/O You can access digital I/O and timing I/O signals on the BNC connectors labeled PFI <0..7>/P1.<0..7>. Figure A-35 shows the DIO/TIO circuitry on the USB-6251 BNC. PFI x /P1. x D GND Figure A-35.
Page 252 USER 2 D GND +5 V D GND P0.0 P0.1 Screw P0.2 Terminal P0.3 Block D GND P0.4 P0.5 P0.6 P0.7 D GND PFI 8/P2.0 Figure A-37. USER <1..2> BNC Connections © National Instruments Corporation A-79 M Series User Manual...
Page 253 Appendix A Device-Specific Information Figure A-38 shows an example of how to use the USER 1 and USER 2 BNCs. To access the PFI 8 signal from a BNC, connect USER 1 on the screw terminal block to PFI 8 with a wire. USER 1 BNC Internal BNC Cable...
Page 254 M Series devices may be used with most E Series accessories. However, some E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-81 M Series User Manual...
Page 255: Figure A-39. Usb-6251 Mass Termination Pinout
Appendix A Device-Specific Information AI 8 AI 0 AI 1 AI GND AI GND AI 9 AI 10 AI 2 AI 3 AI GND AI GND AI 11 AI 4 AI SENSE AI GND AI 12 AI 13 AI 5 AI 6 AI GND AI GND...
Page 256 This section describes some cable and accessory options for M Series devices with one 68-pin connector, such as the USB-6251 Mass Termination device. Refer to for other accessory options including ni.com new devices. © National Instruments Corporation A-83 M Series User Manual...
Page 257 BNC-2090A—Desktop/rack-mountable device with 22 BNCs for connecting analog, digital, and timing signals Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SH68-68-EP shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 258 USB-6251 Mass Termination Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3, Connector and LED Information, for information about the replacing the fuse on the USB-6251 Mass Termination. © National Instruments Corporation A-85 M Series User Manual...
Page 259 Appendix A Device-Specific Information NI 6254 PCI/PXI-6254 Pinout Figure A-40 shows the pinout of the PCI/PXI-6254. The I/O signals appear on two 68-pin connectors. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information.
Page 260: Figure A-40. Pci/Pxi-6254 Pinout
D GND PFI 12/P2.4 AI 17 33 67 AI GND 34 68 D GND PFI 14/P2.6 AI 24 AI 16 NC = No Connect NC = No Connect Figure A-40. PCI/PXI-6254 Pinout © National Instruments Corporation A-87 M Series User Manual...
Page 261 Appendix A Device-Specific Information Table A-18. Default NI-DAQmx Counter/Timer Pins Default Connector 0 Pin Number Counter/Timer Signal (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 262 SCC carriers can be used with Connector 1 with NI-DAQ 7.4 and later. Refer to the SCC Advisor, available by going to ni.com/info entering the info code , for more information. rdscav © National Instruments Corporation A-89 M Series User Manual...
Page 263 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 264 Chapter 2, DAQ System Overview, for more information about custom cabling solutions. NI recommends that you use the SHC68-68-EPM cable; however, an SHC68-68-EP cable will work with M Series devices. © National Instruments Corporation A-91 M Series User Manual...
Page 265 Appendix A Device-Specific Information NI 6255 The following sections contain information about the PCI/PXI-6255, USB-6255 Screw Terminal, and USB-6255 Mass Termination devices. PCI/PXI-6255 PCI/PXI-6255 Pinout Figure A-41 shows the pinout of the PCI/PXI-6255. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3,...
Page 266: Figure A-41. Pci/Pxi-6255 Pinout
AI 18 AI 26 33 67 D GND PFI 12/P2.4 AI 17 AI 25 34 68 D GND PFI 14/P2.6 AI 24 AI 16 NC = No Connect Figure A-41. PCI/PXI-6255 Pinout © National Instruments Corporation A-93 M Series User Manual...
Page 267 Appendix A Device-Specific Information Table A-19. Default NI-DAQmx Counter/Timer Pins Default Connector 0 Pin Number Counter/Timer Signal (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 268 • BNC-2090A—Desktop/rack-mountable device with 22 BNCs for connecting analog, digital, and timing signals You can use the SHC68-68-EPM shielded cable, to connect Connector 0 of your DAQ device to BNC accessories. © National Instruments Corporation A-95 M Series User Manual...
Page 269 BNC connectivity to 24 of the differential (48 single ended) analog input signals on Connector 1. You can use an SHC68-68 cable to connect to the BNC-2115. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks such as: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 270 Chapter 2, DAQ System Overview, for more information about custom cabling solutions. NI recommends that you use the SHC68-68-EPM cable; however, an SHC68-68-EP cable will work with M Series devices. © National Instruments Corporation A-97 M Series User Manual...
Page 271 Appendix A Device-Specific Information USB-6255 Screw Terminal USB-6255 Screw Terminal Pinout Figure A-42 shows the pinout of the USB-6255 Screw Terminal. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information.
Page 272: Figure A-42. Usb-6255 Screw Terminal Pinout
D GND AI 69 PFI 5/P1.5 AI 78 PFI 15/P2.7 AI 70 PFI 6/P1.6 AI 79 +5 V AI 71 PFI 7/P1.7 Chassis Ground Lug Figure A-42. USB-6255 Screw Terminal Pinout © National Instruments Corporation A-99 M Series User Manual...
Page 273 Appendix A Device-Specific Information Table A-20. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 113 (PFI 8) CTR 0 GATE 115 (PFI 9) CTR 0 AUX 117 (PFI 10) CTR 0 OUT 121 (PFI 12) CTR 0 A 113 (PFI 8) CTR 0 Z...
Page 274 M Series devices may be used with most E Series accessories. However, some E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-101 M Series User Manual...
Page 275: Figure A-43. Usb-6255 Mass Termination Pinout
Appendix A Device-Specific Information AI 24 AI 16 AI 8 AI 0 AI 17 AI 25 AI 1 AI GND AI 18 AI 26 AI GND AI 9 AI 27 AI 19 AI 10 AI 2 AI 20 AI 28 AI 3 AI GND AI 21...
Page 276 This section describes some cable and accessory options for M Series devices with two 68-pin connectors, such as the USB-6255 Mass Termination device. Refer to for other accessory options including ni.com new devices. © National Instruments Corporation A-103 M Series User Manual...
Page 277 Appendix A Device-Specific Information SCC Accessories SCC provides portable, modular signal conditioning to your DAQ system. To connect your M Series device to an SCC module carrier, such as the SC-2345, SC-2350, or SCC-68, use an SH68-68-EP shielded cable. Use Connector 0 of your M Series device to control an SCC module carrier. Connector 1 cannot be used with SCCs.
Page 278 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SH68-68-EP shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 279 Appendix A Device-Specific Information Custom Cabling and Connectivity The CA-1000 is a configurable enclosure that gives user-defined connectivity and flexibility through customized panelettes. Visit ni.com for more information about the CA-1000. Refer to the Custom Cabling section of Chapter 2, DAQ System Overview, for more information about custom cabling solutions.
Page 280 M Series devices may be used with most E Series accessories. However, some E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-107 M Series User Manual...
Page 281: Figure A-44. Ni Pci/Pcie/Pxi/Pxie-6259 Pinout
Appendix A Device-Specific Information AI 8 AI 0 68 34 P0.30 D GND AI GND AI 1 P0.28 67 33 D GND AI 9 66 32 AI GND P0.25 P0.24 AI 2 65 31 AI 10 D GND P0.23 AI GND 64 30 AI 3 P0.22...
Page 282 This section describes some cable and accessory options for M Series devices with two 68-pin connectors, such as the NI PCI/PCIe/PXI/PXIe-6259. Refer to for other accessory ni.com options including new devices. © National Instruments Corporation A-109 M Series User Manual...
Page 283 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. Use Connector 0 of your M Series device to control SCXI. NI-DAQ 7.4 and later supports SCXI in parallel mode on Connector 1.
Page 284 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 285 Appendix A Device-Specific Information Cables In most applications, you can use the following cables: • SHC68-68-EPM —High-performance cable designed specifically for M Series devices. It has individual bundles separating analog and digital signals. Each differential analog input channel is routed on an individually shielded twisted pair of wires.
Page 286 Figure A-45 shows the pinout of the USB-6259 Screw Terminal. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. © National Instruments Corporation A-113 M Series User Manual...
Page 287: Figure A-45. Usb-6259 Screw Terminal Pinout
Appendix A Device-Specific Information AI 4 AI 20 AI 0 AI 16 AI 12 AI 28 AI 8 AI 24 AI GND AI GND AI GND AI GND AI 5 AI 21 AI 1 AI 17 AI 13 AI 29 AI 9 AI 25 AI GND...
Page 288 USB-6259 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3, Connector and LED Information, for information about the replacing the fuse on the USB-6259 Screw Terminal. © National Instruments Corporation A-115 M Series User Manual...
Page 289 Appendix A Device-Specific Information USB-6259 BNC USB-6259 BNC Pinout Figure A-46 shows the pinout of the USB-6259 BNC. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. M Series User Manual A-116 ni.com...
Page 290: Figure A-46. Usb-6259 Bnc Top Panel And Pinout
Appendix A Device-Specific Information Figure A-46. USB-6259 BNC Top Panel and Pinout © National Instruments Corporation A-117 M Series User Manual...
Page 291 Appendix A Device-Specific Information Table A-24. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Name CTR 0 SRC PFI 8 CTR 0 GATE PFI 9 CTR 0 AUX PFI 10 CTR 0 OUT PFI 12 CTR 0 A PFI 8 CTR 0 Z PFI 9 CTR 0 B...
Page 292 GS position. This setting disconnects the built-in ground reference resistor from the negative terminal of the BNC connector, allowing the connector to be used as a single-ended channel, as shown in Figure A-49. © National Instruments Corporation A-119 M Series User Manual...
Page 293 Appendix A Device-Specific Information AI x AI x+8 – Ground Ref. Source (GS) USB-62xx BNC Device Figure A-49. Single-Ended Channels When you set the source type to the GS position and software-configure the device for single-ended input, each BNC connector provides access to two single-ended channels, AI x and AI x+8.
Page 294 USB-6259 BNC. APFI x AI GND Figure A-52. Analog Programmable Function Interface Circuitry Refer to the Triggering with an Analog Source section of Chapter 11, Triggering, for more information. © National Instruments Corporation A-121 M Series User Manual...
Page 295 Appendix A Device-Specific Information USER 1 and USER 2 The USER 1 and USER 2 BNC connectors allow you to use a BNC connector for a digital or timing I/O signal of your choice. The USER 1 and USER 2 BNC connectors are routed (internal to the USB-6259 BNC) to the USER 1 and USER 2 screw terminals, as shown in Figure A-53.
Page 296 Information, for information about the USB-6259 BNC LEDs. USB-6259 BNC Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3, Connector and LED Information, for information about the replacing the fuse on the USB-6259 BNC. © National Instruments Corporation A-123 M Series User Manual...
Page 297 Appendix A Device-Specific Information USB-6259 Mass Termination USB-6259 Mass Termination Pinout Figure A-55 shows the pinout of the USB-6259 Mass Termination device. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information.
Page 298: Figure A-55. Usb-6259 Mass Termination Pinout
D GND CONNECTOR 0 CONNECTOR 1 (AI 0–15) (AI 16–31) TERMINAL 68 TERMINAL 35 TERMINAL 68 TERMINAL 35 TERMINAL 34 TERMINAL 1 TERMINAL 34 TERMINAL 1 Figure A-55. USB-6259 Mass Termination Pinout © National Instruments Corporation A-125 M Series User Manual...
Page 299 Appendix A Device-Specific Information Table A-25. Default NI-DAQmx Counter/Timer Pins Default Connector 0 Pin Number Counter/Timer Signal (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 300 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SH68-68-EP shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 301 Appendix A Device-Specific Information You can use one screw terminal accessory with the signals on either connector of your M Series device. You can use two screw terminal accessories with one M Series device by using both connectors. Cables In most applications, you can use the following cables: •...
Page 302 M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-129 M Series User Manual...
Page 303: Figure A-56. Pci/Pxi-6280 Pinout
Appendix A Device-Specific Information 68 34 AI 0 AI 8 67 33 AI GND AI 1 66 32 AI 9 AI GND 65 31 AI 2 AI 10 64 30 AI GND AI 3 63 29 AI 11 AI GND 62 28 AI SENSE AI 4...
Page 304 PCI/PXI-6280 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68-pin connector, such as the PCI/PXI-6280. Refer to for other accessory options including new devices. ni.com © National Instruments Corporation A-131 M Series User Manual...
Page 305 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. You also can use an M Series device to control the SCXI section of a PXI/SCXI combination chassis, such as the PXI-1010 or PXI-1011.
Page 306 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 307 Appendix A Device-Specific Information NI 6281 PCI/PXI-6281 Pinout Figure A-57 shows the pinout of the PCI/PXI-6281. For a detailed description of each signal, refer to the I/O Connector Signal Descriptions section of Chapter 3, Connector and LED Information. M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names.
Page 308: Figure A-57. Pci/Pxi-6281 Pinout
PFI 4/P1.4 D GND PFI 13/P2.5 PFI 5/P1.5 PFI 15/P2.7 PFI 6/P1.6 PFI 7/P1.7 D GND PFI 8/P2.0 PFI 9/P2.1 D GND PFI 12/P2.4 D GND PFI 14/P2.6 Figure A-57. PCI/PXI-6281 Pinout © National Instruments Corporation A-135 M Series User Manual...
Page 309 Appendix A Device-Specific Information Table A-27. Default NI-DAQmx Counter/Timer Pins Counter/Timer Signal Default Pin Number (Name) CTR 0 SRC 37 (PFI 8) CTR 0 GATE 3 (PFI 9) CTR 0 AUX 45 (PFI 10) CTR 0 OUT 2 (PFI 12) CTR 0 A 37 (PFI 8) CTR 0 Z...
Page 310 BNC-2120—Similar to the BNC-2110, and also has a built-in function generator, quadrature encoder, temperature reference, and thermocouple connector • BNC-2090A—Desktop/rack-mountable device with 22 BNCs for connecting analog, digital, and timing signals © National Instruments Corporation A-137 M Series User Manual...
Page 311 Appendix A Device-Specific Information Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: • CB-68LP and CB-68LPR unshielded connector blocks •...
Page 312 M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-139 M Series User Manual...
Page 313: Figure A-58. Pci/Pxi-6284 Pinout
Appendix A Device-Specific Information AI 0 68 34 AI 8 P0.30 D GND AI GND 67 33 AI 1 P0.28 D GND AI GND AI 9 66 32 P0.25 P0.24 AI 2 65 31 AI 10 D GND P0.23 AI GND 64 30 AI 3 P0.22...
Page 314 PCI/PXI-6284 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68-pin connectors, such as the PCI/PXI-6284. Refer to for other accessory options including new devices. ni.com © National Instruments Corporation A-141 M Series User Manual...
Page 315 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. Use Connector 0 of your M Series device to control SCXI. NI-DAQ 7.4 and later supports SCXI in parallel mode on Connector 1.
Page 316 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 317 Appendix A Device-Specific Information Cables In most applications, you can use the following cables: • SHC68-68-EPM —High-performance cable designed specifically for M Series devices. It has individual bundles separating analog and digital signals. Each differential analog input channel is routed on an individually shielded twisted pair of wires.
Page 318 M Series devices may be used with most E Series accessories. However, some Note E Series accessories use different terminal names. Refer to the M Series and E Series Pinout Comparison section of Chapter 3, Connector and LED Information, for more information. © National Instruments Corporation A-145 M Series User Manual...
Page 319: Figure A-59. Pci/Pxi-6289 Pinout
Appendix A Device-Specific Information AI 0 68 34 AI 8 P0.30 D GND AI GND 67 33 AI 1 P0.28 D GND AI GND AI 9 66 32 P0.25 P0.24 AI 2 65 31 AI 10 D GND P0.23 AI GND 64 30 AI 3 P0.22...
Page 320 PCI/PXI-6289 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68-pin connectors, such as the PCI/PXI-6289. Refer to for other accessory options including new devices. ni.com © National Instruments Corporation A-147 M Series User Manual...
Page 321 Appendix A Device-Specific Information SCXI Accessories SCXI is a programmable signal conditioning system designed for measurement and automation applications. To connect your M Series device to an SCXI chassis, use the SCXI-1349 adapter and an SHC68-68-EPM cable. Use Connector 0 of your M Series device to control SCXI. NI-DAQ 7.4 and later supports SCXI in parallel mode on Connector 1.
Page 322 M Series device. You can use two BNC accessories with one M Series device by using both connectors. Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks. Use an SHC68-68-EPM shielded cable to connect an M Series device to a connector block, such as the following: •...
Page 323 Appendix A Device-Specific Information Cables In most applications, you can use the following cables: • SHC68-68-EPM —High-performance cable designed specifically for M Series devices. It has individual bundles separating analog and digital signals. Each differential analog input channel is routed on an individually shielded twisted pair of wires.
Page 324 • Output Timing—Output timing refers to the timing parameters related to exporting signals internal to the device to a terminal for external use. © National Instruments Corporation M Series User Manual...
Page 325 Appendix B Timing Diagrams Figure B-1 is a simplified model of the M Series analog input timing engine. POUT Selected Reference Trigger Reference Trigger Terminal Terminal POUT Start Terminal Terminal Selected Start POUT RTSI Selected Pause Trigger Terminal Pause Trigger SI Start (and Other Counters, Terminal...
Page 326 Pause Trigger is the signal that becomes the Pause Trigger signal before synchronization. • p_AI_Convert—The signal that starts the conversions of data at the ADC component. This signal goes directly to the ADC, but copies can be routed to output terminals. © National Instruments Corporation M Series User Manual...
Page 327 Appendix B Timing Diagrams Input Timing Input timing refers to the delays involved in importing external signals to be used as triggers or clocks in the AI timing engine. Figures B-2 and B-3 and Table B-1 describe the insertion delays for external signals. Selected Reference Trigger Reference Trigger Terminal...
Page 328 This delay is long enough so that external signals can be synchronized with Sync Convert Clock Timebase and used by Convert Clock Timebase. For timing diagrams and parameters for this case, refer to the Convert Clock section. © National Instruments Corporation M Series User Manual...
Page 329 Appendix B Timing Diagrams The second level of timing is the sample level. Basically, converts are grouped in sets called samples, and the timing of the samples can be independent from the timing of the converts. The M Series device can use a timebase to generate the sample timing.
Page 330 — Delay to Sample Clock Timebase RTSI STAR Delay to Sync Sample Clock Timebase RTSI STAR Delay to Convert Clock Timebase 10.2 RTSI STAR Delay to Sync Convert Clock Timebase RTSI STAR © National Instruments Corporation M Series User Manual...
Page 331 Appendix B Timing Diagrams Convert Clock Convert Clock is the signal that determines when an analog to digital conversion is started. The signal going to the ADC is called p_AI_Convert. Convert Clock also can be routed to several external I/O terminals for external use.
Page 332 — 13.0 p_AI_Convert Delay from Convert Clock Timebase to 10.8 Convert Clock, when exported to an RTSI 10.5 external terminal (POUT) p_AI_Convert Figure B-8. Convert Clock and Any Internal Signal Timing Diagram © National Instruments Corporation M Series User Manual...
Page 333 Appendix B Timing Diagrams Table B-4. Convert Clock and Any Internal Signal Timing Time Description Line Min (ns) Max (ns) _i to p_AI_Convert in external 22.2 52.1 convert mode RTSI 22.1 51.8 STAR 21.5 49.1 Start Start is the signal that starts an AI acquisition. This signal can come from an external source (through an external terminal) or from an internal source.
Page 334 Selected Sample Clock Terminal Terminal Figure B-9. Convert Clock Timebase Timing and the Analog Input Timing Engine Selected Start Sync Convert Clock Timebase Start POUT Figure B-10. Convert Clock Timebase Timing Diagram © National Instruments Corporation B-11 M Series User Manual...
Page 335 Appendix B Timing Diagrams Table B-5. Convert Clock Timebase Timing Time Description Line Min (ns) Max (ns) Delay to Selected Start RTSI STAR Selected Start Setup Time — — (to Sync Convert Clock Timebase) Selected Start Hold Time — — (to Sync Convert Clock Timebase) Sync Convert Clock Timebase to Start —...
Page 336 The Reference Trigger can come from external or internal sources and its source is selected with a multiplexer. Its output is called the Selected Reference Trigger. © National Instruments Corporation B-13 M Series User Manual...
Page 337 Appendix B Timing Diagrams POUT Selected Reference Trigger Reference Trigger Terminal Terminal Start Terminal Terminal Selected Start RTSI Selected Pause Trigger Terminal SI Start Pause Trigger Terminal Sample Clock Timebase Counter Block Sync Sample Clock Timebase Terminal SI_TC p_AI_Convert SI2_TC Convert Clock Timebase Counter Block...
Page 338 Sample Clock Timebase signal. All the sources for Sample Clock are at the _i level and are selected using a multiplexer. The output of this multiplexer is called Selected Sample Clock. © National Instruments Corporation B-15 M Series User Manual...
Page 339 Appendix B Timing Diagrams Selected Reference Trigger Reference Trigger Terminal Terminal Start Terminal Terminal Selected Start RTSI Selected Pause Trigger Terminal Pause Trigger SI Start Terminal Sample Clock Timebase Counter Block Sync Sample Clock Timebase Terminal SI_TC p_AI_Convert SI2_TC Convert Clock Timebase Counter Block Sync Convert Clock Timebase...
Page 340 Table B-9. AI_Sample_In_Progress Timing Time Description Line Min (ns) Max (ns) Sample Clock to POUT as leading edge of AI_Sample_In_Progress RTSI Convert Clock to POUT as trailing edge 12.4 of AI_Sample_In_Progress RTSI 13.6 © National Instruments Corporation B-17 M Series User Manual...
Page 341 Appendix B Timing Diagrams Pause Trigger The Pause Trigger signal can be used to pause the acquisition any time the signal deasserts. It is generated from internal or external sources. A multiplexer selects a signal from the _i bus; its output is called Selected Pause Trigger.
Page 342 The delays presented in this section assume a 200 pF load on PFI lines and a 50 pF load on RTSI lines. Actual delays will vary with the actual load. © National Instruments Corporation B-19 M Series User Manual...
Page 343 Appendix B Timing Diagrams POUT Selected Reference Trigger Reference Trigger Terminal Terminal POUT Start Terminal Terminal Selected Start POUT RTSI Selected Pause Trigger Terminal Pause Trigger SI Start Terminal Sample Clock Timebase Counter Block Sync Sample Clock Timebase POUT Terminal SI_TC p_AI_Convert SI2_TC...
Page 344 DAC will perform a data conversion. This signal can come directly from an external signal or can be the result of dividing down the Sample Clock Timebase using the UI counter. © National Instruments Corporation B-21 M Series User Manual...
Page 345 Appendix B Timing Diagrams • Sample Clock Timebase—This signal can be used to generate the Sample Clock. This signal acts as the clock for the UI counter, and a Sample Clock can be generated every N periods of the Sample Clock Timebase by programming the UI counter accordingly.
Page 346 Sample Clock, analog output internal clock timing can be derived from Table B-13. Signal_i Sync Sample Clock Timebase Sample Clock Timebase Figure B-24. External Update Source Clock Insertions Timing Diagram © National Instruments Corporation B-23 M Series User Manual...
Page 347 Appendix B Timing Diagrams Table B-13. External Update Source Clock Insertions Timing Time From Min (ns) Max (ns) Signal_i Sample Clock Timebase 11.6 30.0 Signal_i Sync Sample Clock Timebase If the Sample Clock is being generated by dividing down the Sample Clock Timebase, the analog output generation is timed from the output of the UI counter.
Page 348 Setup — Hold — Pause Trigger The analog output Pause Trigger can be used to pause an ongoing generation. It is received on the rising edge of Sync Sample Clock Timebase. © National Instruments Corporation B-25 M Series User Manual...
Page 349 Appendix B Timing Diagrams Selected Pause Signal_i To Internal Logic Logic Sync Sample Clock Timebase Figure B-28. Pause Trigger Input Delay Path Signal_i Selected Pause Sync Sample Clock Timebase Figure B-29. Pause Trigger Timing Diagram Table B-17. Pause Trigger Timing from Signal_i to Selected Pause Time From Min (ns)
Page 350 For setup calculations, use the bigger number for TriggerDelay and the smaller number ClockDelay. For hold calculations, use the smaller number for TriggerDelay and the larger number for ClockDelay. © National Instruments Corporation B-27 M Series User Manual...
Page 351 Appendix B Timing Diagrams Output Timing The analog output timer has three possible trigger outputs—Start Trigger, Pause Trigger, and Sample Clock. The delays presented in this section assume a 200 pF load on PFI lines and a 50 pF load on RTSI lines. Actual delays will vary with the actual load.
Page 352 Clock Timebase. It can be calculated by adding the Sample Clock Timebase insertion to the delay in Table B-21. The exported Sample Clock signal is active low, each falling edge representing a conversion. © National Instruments Corporation B-29 M Series User Manual...
Page 353 Appendix B Timing Diagrams Routing Logic RTSI, PFI Internal Logic To Internal Logic Sample Clock Timebase Figure B-35. Sample Clock Path Sample Clock Timebase RTSI/PFI Terminal Figure B-36. Sample Clock Delay Timing Diagram Table B-21. Sample Clock Delay Timing Time From Min (ns) Max (ns)
Page 354 Your inputs must meet the requirements to ensure proper behavior. PFI, RTSI, or PXI_STAR PFI_i, RTSI_i, or PXI_STAR_i DI Sample Clock P0_i PFI (Output) Figure B-38. Digital Waveform Acquisition Timing Delays © National Instruments Corporation B-31 M Series User Manual...
Page 355 Appendix B Timing Diagrams Table B-22. DI Timing Delays Time From Min (ns) Max (ns) PFI_i 18.2 22.0 RTSI RTSI_i PXI_STAR PXI_STAR_i PFI_i, RTSI_i, PXI_STAR_i, or DI Sample Clock other internal signal P0_i 20.1 DI Sample Clock PFI (output) 29.8 †...
Page 356 Your inputs must meet the requirements to ensure proper behavior. PFI, RTSI, or PXI_STAR PFI_i, RTSI_i, or PXI_STAR_i DO Sample Clock PFI (Output) Figure B-40. Digital Waveform Acquisition Timing Delays © National Instruments Corporation B-33 M Series User Manual...
Page 357 Appendix B Timing Diagrams Table B-24. DO Timing Delays Time From Min (ns) Max (ns) PFI_i 18.2 22.0 RTSI RTSI_i PXI_STAR PXI_STAR_i PFI_i, RTSI_i, PXI_STAR_i, or DO Sample Clock other internal signal DO Sample Clock 27.5 DO Sample Clock PFI (output) 29.8 †...
Page 358 The delay ranges given for PFI and RTSI represent the fastest and slowest terminal routing within the trigger group for a given condition (maximum or minimum timing). This difference can be useful when two external signals will be used together and the relative timing between the signals is important. © National Instruments Corporation B-35 M Series User Manual...
Page 359 Appendix B Timing Diagrams Selected Gate and Selected Source Delays Tables B-27 and B-28 show the timing for the Selected Source and Selected Gate internal signals. Selected Source is used to clock the 32-bit counter. Selected Gate drives the Gate Logic, which generates the Counter Enable signal. All internal counter timing is referenced to these two signals.
Page 360 1/2 Source Period – 1 ns 1/2 Source Period + 3 ns Level 1/2 Source Period – 2.5 ns 1/2 Source Period – 1 ns External Source Edge 22.0 Level 18.0 © National Instruments Corporation B-37 M Series User Manual...
Page 361 Appendix B Timing Diagrams Input Requirements Refer to the Figure B-41 for the M Series counter/timer circuitry. Source Period and Pulse Width Figure B-46 and Table B-30 show the timing requirements for Counter n Source. The requirements depend on the synchronization mode. Counter n Source Figure B-46.
Page 362 PFI pins for the first case (where a PFI pin drives Counter n Source and a different PFI pin drives Counter n Gate). PFI (Gate) PFI (Source) Figure B-48. Gate to Source Setup and Hold Timing Diagram © National Instruments Corporation B-39 M Series User Manual...
Page 363 Appendix B Timing Diagrams Table B-32. Gate to Source Setup and Hold Timing Synchronization Time Description Gating Mode Mode Min (ns) Max (ns) Setup time from PFI (Gate) Edge External Source 12.3 — to PFI (Source) Level External Source — Hold time from PFI (Gate) Edge External Source...
Page 364 + 0.0 ns 12.2 ns Source Delay PFI to PFI_i 6.2 ns PFI_i to Selected Source + 8.0 ns 14.2 ns > 14.2 ns – 12.2 ns = 2.0 ns Hold © National Instruments Corporation B-41 M Series User Manual...
Page 365 Appendix B Timing Diagrams Output Delays Refer to the Figure B-41 for the M Series counter/timer circuitry. Figure B-50 and Table B-34 show the output delays. Selected Source Out_o PFI, RTSI (Counter n Internal Out) PFI, RTSI (Counter n Source) Selected Gate PFI, RTSI (Counter n Gate)
Page 366 Table B-35 shows the timing requirements for these signals. Counter n A Counter n B Counter n Z Figure B-51. Quadrature and Two Pulse Encoder Timing Diagrams © National Instruments Corporation B-43 M Series User Manual...
Page 367 Appendix B Timing Diagrams Table B-35. Quadrature and Two Pulse Encoder Timing Time Description Min (ns) Max (ns) Counter n A Period 50.0 — Counter n A Pulse Width 25.0 — Counter n B Period 50.0 — Counter n B Pulse Width 25.0 —...
Page 368 Table B-37. Generating Different Clocks Using an External Reference Clock and the PLL Time From Min (ns) Max (ns) 80 MHz Timebase 20 MHz Timebase The source of the external 80 MHz Timebase reference clock (RTSI <0..7>, (through PLL_OUT) STAR_TRIG, PXI_CLK10) © National Instruments Corporation B-45 M Series User Manual...
Page 369 Troubleshooting This section contains common questions about M Series devices. If your questions are not answered here, refer to the National Instruments KnowledgeBase at ni.com/kb Analog Input I am seeing crosstalk or ghost voltages when sampling multiple channels. What does this mean?
Page 370 Appendix C Troubleshooting are various methods of achieving this reference while maintaining a high common-mode rejection ratio (CMRR). These methods are outlined in the Connecting Analog Input Signals section of Chapter 4, Analog Input. AI GND is an AI common signal that routes directly to the ground connection point on the devices.
Page 371 E Series to M Series devices. Customers also can refer to NI’s KnowledgeBase at ni.com/kb Developer Zone at for more updated troubleshooting ni.com/devzone tips and answers to frequently asked questions about M Series devices. © National Instruments Corporation M Series User Manual...
Page 372 PCI bus and power rails, and contains an up-to-date list of computers with power rails that do not support M Series devices. To access this KnowledgeBase, go to and enter the info code ni.com/info rdmseis © National Instruments Corporation M Series User Manual...
Page 373 Technical Support and Professional Services Visit the following sections of the National Instruments Web site at for technical support and professional services: ni.com • Support—Online technical support resources at ni.com/support include the following: – Self-Help Resources—For answers and solutions, visit the...
Page 374 Appendix E Technical Support and Professional Services • Calibration Certificate—If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration If you searched and could not find the answers you need, contact ni.com your local office or NI corporate headquarters. Phone numbers for our worldwide offices are listed at the front of this manual.
Page 375 – Negative of, or minus. ± Plus or minus. < Less than. > Greater than. ≤ Less than or equal to. ≥ Greater than or equal to. Per. º Degree. Ω Ohm. © National Instruments Corporation M Series User Manual...
Page 376 Glossary Amperes—the unit of electric current. Analog-to-Digital. Most often used as A/D converter. Alternating current. accuracy A measure of the capability of an instrument or sensor to faithfully indicate the value of the measured signal. This term is not related to resolution; however, the accuracy level can never be better than the resolution of the instrument.
Page 377 Bayonet-Neill-Concelman—A type of coaxial connector used in situations requiring shielded cable for signal connections and/or controlled impedance applications. buffer 1. Temporary storage for acquired or generated data. 2. A memory device that stores intermediate data between two devices. © National Instruments Corporation M Series User Manual...
Page 378 Glossary bus, buses The group of electrical conductors that interconnect individual circuitry in a computer. Typically, a bus is the expansion vehicle to which I/O or other devices are connected. Examples of PC buses are the PCI, AT(ISA), and EISA bus. Celsius.
Page 379 In the instrumentation world, DACs can be used to generate arbitrary waveform shapes, defined by the software algorithm that computes the digital data pattern, which is fed to the DAC. © National Instruments Corporation M Series User Manual...
Page 380 Glossary 1. Data acquisition—The process of collecting and measuring electrical signals from sensors, transducers, and test probes or fixtures and inputting them to a computer for processing. 2. Data acquisition—The process of collecting and measuring the same kinds of electrical signals with A/D and/or DIO devices plugged into a computer, and possibly generating control signals with D/A and/or DIO devices in the same computer.
Page 381 A technique that locates an edge of an analog signal, such as the edge of a square wave. EEPROM Electrically Erasable Programmable Read-Only Memory—ROM that can be erased with an electrical signal and reprogrammed. Some SCXI modules contain an EEPROM to store measurement-correction coefficients. © National Instruments Corporation M Series User Manual...
Page 382 Glossary encoder A device that converts linear or rotary displacement into digital or pulse signals. The most popular type of encoder is the optical encoder, which uses a rotating disk with alternating opaque areas, a light source, and a photodetector. EXTCLK External clock signal.
Page 383 A form of triggering where you set the start time of an acquisition and gather data at a known position in time relative to a trigger signal. © National Instruments Corporation M Series User Manual...
Page 384 Glossary 1. Hertz—The SI unit for measurement of frequency. One hertz (Hz) equals one cycle per second. 2. The number of scans read or updates written per second. hysteresis Lag between making a change and the effect of the change. Input/Output—The transfer of data to/from a computer system involving communications channels, operator interface devices, and/or data acquisition and control interfaces.
Page 385 DAQ devices, such as the M Series multifunction I/O (MIO) devices, SCXI signal conditioning modules, and switch modules. Megahertz—A unit of frequency; 1 MHz = 10 Hz = 1,000,000 Hz. © National Instruments Corporation G-11 M Series User Manual...
Page 386 National Instruments. NI-DAQ The driver software needed to use National Instruments DAQ devices and SCXI components. Some devices use Traditional NI-DAQ (Legacy); others use NI-DAQmx. M Series User Manual G-12 ni.com...
Page 387 ×1 link can provide approximately 200 MB/s of input capability and 200 MB/s of output capability. Increasing the number of lanes in a link increases maximum throughput by approximately the same factor. PCIe See PCI Express. © National Instruments Corporation G-13 M Series User Manual...
Page 388 The time from the rising to the falling slope of a pulse (at 50% amplitude). A rugged, open system for modular instrumentation based on CompactPCI, with special mechanical, electrical, and software features. The PXIbus standard was originally developed by National Instruments in 1997, and is now managed by the PXIbus Systems Alliance. PXI Express PCI Express eXtensions for Instrumentation—The PXI implementation...
Page 389 RTSI Real-Time System Integration. RTSI bus Real-Time System Integration bus—The National Instruments timing bus that connects DAQ devices directly, by means of connectors on top of the devices, for precise synchronization of functions. © National Instruments Corporation...
Page 390 Glossary Seconds. Samples. sample counter The clock that counts the output of the channel clock, in other words, the number of samples taken. On devices with simultaneous sampling, this counter counts the output of the scan clock and hence the number of scans. scan One or more analog or digital input samples.
Page 391 In NI-DAQmx, a collection of one or more channels, timing, and triggering and other properties that apply to the task itself. Conceptually, a task represents a measurement or generation you want to perform. terminal count. © National Instruments Corporation G-17 M Series User Manual...
Page 392 Glossary terminal An object or region on a node through which data passes. terminal count The highest value of a counter. Gate hold time. Gate setup time. Gate pulse width. Timebase The reference signals for controlling the basic accuracy of time or frequency-based measurements.
Page 393 Signal source voltage. virtual channel See channel. waveform 1. The plot of the instantaneous amplitude of a signal as a function of time. 2. Multiple voltage readings taken at a specific sampling rate. © National Instruments Corporation G-19 M Series User Manual...
Page 394 11-4 USB-6225 Mass Termination, A-41 trigger actions, 11-3 USB-6251 Mass Termination, A-83 trigger types, 11-3 USB-6255 Mass Termination, A-103 triggering, 11-2 USB-6259 Mass Termination, A-126 used with M Series, D-1 © National Instruments Corporation M Series User Manual...
Page 395 Index analog edge triggering fundamentals, 5-1 with hysteresis, 11-4 getting started with applications in software, 5-12 analog input, 4-1 glitches on the output signal, 5-4 channels, 11-3 offset, 5-2 charge injection, C-1 reference selection, 5-2 circuitry, 4-1 timing diagrams, B-21 connecting signals, 4-13 timing signals, 5-7 connecting through I/O connector, 4-1...
Page 396 AI ground-reference settings in NI 6289, A-147 software, 4-7 NI PCI/PCIe/PXI/PXIe-6259, A-109 connecting NI 6250, A-63 analog input signals, 4-13 NI 6254, A-88 analog output signals, 5-6 PCI/PCIe/PXI/PXIe-6251, A-68 counter signals, C-3 © National Instruments Corporation M Series User Manual...
Page 397 Index digital I/O signals, 6-9 USB-6255 Screw Terminal pinout, A-98 floating signal sources, 4-15 USB-6259 BNC pinout, A-116 ground-referenced signal sources, 4-21 USB-6259 Mass Termination pinout, A-124 PFI input signals, 8-4 USB-6259 Screw Terminal pinout, A-113 connections considerations for floating signal sources, 4-20 for field wiring, 4-25 single-ended for floating signal sources, 4-20...
Page 398 A-1 generation, 7-21 multiple synchronization, 9-3 simple pulse generation, 7-19 NI 6220, A-2 single pulse generation, 7-19 NI 6221, A-7 single pulse generation with start NI 6224, A-24 trigger, 7-20 NI 6225, A-30 synchronization modes, 7-38 NI 6229, A-45...
Page 399 Index when to use with ground-referenced disk drive power connector (PCI Express signal sources, 4-21 devices), 3-8 differential analog input, troubleshooting, C-1 DMA, 10-1 differential connections as a transfer method, 10-4 using with floating signal sources, 4-16 changing data transfer methods, 10-5 using with ground-referenced signal controllers, 10-1 sources, 4-23...
Page 400 Frequency Output signal, 7-30 channels, C-1 fuse replacement ground-reference USB-6221 BNC, A-23 connections, checking, C-1 USB-6221 Screw Terminal, A-16 settings, 4-1, 4-5 USB-6225 Mass Termination, A-44 analog input, 4-5 USB-6225 Screw Terminal, A-38 © National Instruments Corporation M Series User Manual...
Page 401 Index ground-referenced signal sources USB-6225 Screw Terminal pinout, A-36 connecting, 4-21 USB-6229 BNC pinout, A-54 description, 4-21 USB-6229 Screw Terminal pinout, A-51 using in differential mode, 4-23 USB-6251 BNC pinout, A-73 using in NRSE mode, 4-24 USB-6251 Mass Termination pinout, A-81 when to use in differential mode, 4-21 USB-6251 Screw Terminal pinout, A-71 when to use in NRSE mode, 4-22...
Page 402 E Series accessories, D-1 MUX, 4-1 differences from E Series, D-1 information, A-1 migrating applications to, D-1 pinout comparison versus E Series, 3-5 National Instruments support and specifications, xx, A-1 services, E-1 upgrading to, D-1 .NET languages documentation, xx Mac OS X, xvii...
Page 403 Index NI 6224, A-24 NI 6289, A-145 accessory options, A-26 accessory options, A-147 cabling options, A-26 cabling options, A-147 pinout, A-24 pinout, A-145 specifications, A-26 specifications, A-147 NI 6225, A-30 NI support and services, E-1 specifications, A-41 NI-DAQ documentation, xvi NI 6229, A-45 device documentation browser, xx NI 6250, A-61...
Page 404 PFI PCI/PXI-6225 terminals, 8-3 accessory options, A-32 filters, 8-4 cabling options, A-32 I/O protection, 8-6 pinout, A-30 programmable power-up states, 8-6 specifications, A-32 using terminals as static digital I/Os, 8-3 © National Instruments Corporation I-11 M Series User Manual...
Page 405 Index using terminals as timing input power signals, 8-2 +5 V, 3-7 PFI terminals as static digital I/Os, 8-3 connector, PCI Express disk drive, 3-8 pin assignments. See pinouts rail, D-1 pinouts power-up states, 6-7, 8-6 comparison, 3-5 prescaling, 7-34 counter default, 7-30 programmable device, 1-1...
Page 406 3-2 retriggerable single pulse generation, 7-21 signal label routing USB screw terminal devices, 1-2 analog comparison event to an output signal routing, RTSI bus, 9-4 terminal, 11-3 © National Instruments Corporation I-13 M Series User Manual...
Page 407 Index signal sources Frequency Output, 7-30 floating, 4-15 minimizing output glitches, C-3 ground-referenced, 4-21 output, minimizing glitches on, 5-4 Signal Stream, USB, 10-1 simple pulse generation, 7-19 signals single AI Convert Clock, 4-31 period measurement, 7-6 AI Convert Clock Timebase, 4-35 point edge counting, 7-2 AI Hold Complete Event, 4-36 pulse generation, 7-19...
Page 408 B-39 terminals input timing verification, B-26 connecting counter, 7-30 internal analog output timing, B-23 NI-DAQmx default counter, 7-30 output timing, B-28 pulse width input requirements, B-38 © National Instruments Corporation I-15 M Series User Manual...
Page 409 Index quadrature encoder, B-43 two-signal edge-separation measurement, 7-17 selected gate to count enable delays, B-37 buffered, 7-18 selected gate to selected source delays, B-36 single, 7-18 source period input requirements, B-38 types of analog triggers, 11-3 two pulse encoder, B-43 timing output signals, exporting using PFI terminals, 8-3 upgrading from E Series to M Series, D-1...
Page 410 A-85 cabling options, A-126 LED patterns, A-85 fuse replacement, A-128 pinout, A-81 LED patterns, A-128 specifications, A-83 pinout, A-124 USB cable strain relief, 1-3 specifications, A-126 USB cable strain relief, 1-3 © National Instruments Corporation I-17 M Series User Manual...
Page 411 Index USB-6259 Screw Terminal fuse replacement, A-115 waveform LED patterns, A-115 generation pinout, A-113 digital, 6-5 signal label, 1-2 signals, 5-7 specifications, A-115 triggering, 6-3 USB cable strain relief, 1-3 Web resources, E-1 using low impedance sources, 4-8 PFI terminals as static digital I/Os, 8-3 X1 encoding, 7-15 as timing input signals, 8-2...

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National Instruments NI 6221 User Manual

About this Manual

Chapter 1 Getting Started

Chapter 2 DAQ System Overview

Chapter 3 Connector and LED Information

Chapter 4 Analog Input

Chapter 5 Analog Output

Chapter 6 Digital I/O

Chapter 7 Counters

Chapter 8 PFI

Chapter 9 Digital Routing and Clock Generation

Chapter 10 Bus Interface

Chapter 11 Triggering

Appendix D

Appendix E

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Summary of Contents for National Instruments NI 6221