National Instruments SC Express NI PXIe-4300 User Manual
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Summary of Contents for National Instruments SC Express NI PXIe-4300
- Page 1 NI SC Express NI PXIe-4300 User Manual NI PXIe-4300 User Manual April 2010 373024A-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.
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Page 4: Table Of Contents
Getting Started with AI Applications in Software ..........2-18 External Reference Clock................2-19 10 MHz Reference Clock..............2-20 Synchronizing Multiple Devices ..............2-20 Triggering ......................2-21 Analog Triggering................2-21 Digital Input Triggering ..............2-24 TB-4300/4300B Accessory...............2-24 Accessory Auto-Detection ..............2-25 Isolation.....................2-25 © National Instruments Corporation NI PXIe-4300 User Manual... - Page 5 Contents Chapter 3 NI SC Express Considerations PXI and NI SC Express Clock and Trigger Signals ............3-1 PXIe_CLK100 ....................3-1 PXIe_SYNC100....................3-1 PXI_CLK10 ....................3-1 PXI Triggers....................3-2 PXI_STAR Trigger ..................3-2 PXI_STAR Filters................... 3-2 PXIe_DSTAR <A..C> ..................3-2 Data Transfer Methods ....................
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Page 6: Getting Started
Self-calibration should be performed after the module has warmed up for the recommended time period. Refer to the NI PXIe-4300 Specifications for the module warm-up time and self-calibration conditions. © National Instruments Corporation NI PXIe-4300 User Manual... - Page 7 Chapter 1 Getting Started You can initiate self-calibration using Measurement & Automation Explorer (MAX), by completing the following steps. Launch MAX. Select My System»Devices and Interfaces»your module. Initiate self-calibration using one of the following methods: • Click Self-Calibrate in the upper right corner of MAX. •...
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Page 8: Using The Ni Pxie-4300
The COM connection should be made as close to the source as possible to take advantage of the differential nature of this device. Refer to the NI SC Express 4300 Installation Guide and Terminal Block Specifications document for details about signal terminal locations. © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 9: Device Pinout
Chapter 2 Using the NI PXIe-4300 Device Pinout This is the pinout represented on the front connector of the NI PXIe-4300. Refer to the I/O Connector Signal Description section for definitions of each signal. Refer to the terminal block installation guide for signal locations on the terminal block. NI PXIe-4300 User Manual ni.com... -
Page 10: Table 2-1. Front Signal Pin Assignments
PFI 0 PFI 1 — — — — — — Channel — — — — — — — is no connection, RSVD COM 7 RSVD isolation barrier, RSVD RSVD RSVD RSVD is reserved © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 11: I/O Connector Signal Description
Chapter 2 Using the NI PXIe-4300 I/O Connector Signal Description Table 2-2 describes the signals found on the I/O connectors. Table 2-2. I/O Connector Signal Descriptions Signal Names Reference Direction Description COM <0..7> — — Analog Input Isolated Common Ground—These terminals are the reference point for differential analog input measurements. -
Page 12: Figure 2-2. Ni Pxie-4300 Block Diagram
AI6– Channel Power AI CH 7 M-CAL Selectable AI7+ PGIA Filter AI7– Power Channel Power Terminal Block Power Terminal Block Communication Isolated Non-Isolated 300 V Isolation Figure 2-2. NI PXIe-4300 Block Diagram © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 13: Signal Acquisition Considerations
Chapter 2 Using the NI PXIe-4300 Signal Acquisition Considerations This section contains information about signal acquisition concepts including timing, triggering, and synchronization. Input Ranges Input range refers to the set of input voltages that an analog input channel can digitize with the specified accuracy. -
Page 14: Adc
Hardware-timed acquisitions have several advantages over software-timed acquisitions: • The time between samples can be much shorter. • The timing between samples is deterministic. • Hardware-timed acquisitions can use hardware triggering. © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 15: Analog Input Filter
Chapter 2 Using the NI PXIe-4300 Hardware-timed operations can be buffered or hardware-timed single point (HWTSP). A buffer is a temporary storage in computer memory for to-be-transferred samples. • Buffered—In a buffered acquisition, data is moved from the onboard FIFO memory of the DAQ device to a PC buffer using DMA before it is transferred to application memory. -
Page 16: Gain
NI PXIe-4300 modules use AI Sample Clock (ai/SampleClock) to perform simultaneous sampling on all active analog channels. Since there is one ADC per channel, AI Sample Clock controls the sample period on all the channels in the task. © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 17: Figure 2-4. Typical Posttriggered Daq Sequence
Chapter 2 Using the NI PXIe-4300 An acquisition with posttrigger data allows you to view data that is acquired after a trigger event is received. A typical posttrigger DAQ sequence is shown in Figure 2-4. The sample counter is loaded with the specified number of posttrigger samples, in this example, five. The value decrements with each pulse on AI Sample Clock, until the value reaches zero and all desired samples have been acquired. -
Page 18: Aggregate Versus Single Channel Sample Rates
You can specify an internal or external source for AI Sample Clock. You also can specify whether the measurement sample begins on the rising edge or falling edge of AI Sample Clock. © National Instruments Corporation 2-11 NI PXIe-4300 User Manual... - Page 19 Chapter 2 Using the NI PXIe-4300 Using an Internal Source One of the following internal signals can drive AI Sample Clock: • AI Sample Clock Timebase (divided down). • A pulse initiated by host software that does a software, on demand, acquisition. A programmable internal counter divides down the sample clock timebase.
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Page 20: Ai Sample Clock Timebase Signal
Clock Timebase is divided down to provide one of the possible sources for AI Sample Clock. You can configure the polarity selection for AI Sample Clock Timebase as either rising or falling edge, except on 100 MHz Timebase or 20 MHz Timebase. © National Instruments Corporation 2-13 NI PXIe-4300 User Manual... -
Page 21: Ai Start Trigger Signal
Chapter 2 Using the NI PXIe-4300 AI Start Trigger Signal Use the AI Start Trigger (ai/StartTrigger) signal to begin a measurement acquisition. A measurement acquisition consists of one or more samples. If you do not use triggers, begin a measurement with a software command by starting a task, which sends the software command that begins the measurement. -
Page 22: Ai Reference Trigger Signal
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 rdcanq ni.com/info © National Instruments Corporation 2-15 NI PXIe-4300 User Manual... -
Page 23: Figure 2-8. Reference Trigger Final Buffer
Chapter 2 Using the NI PXIe-4300 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 2-8 shows the final buffer. Reference Trigger Pretrigger Samples Posttrigger Samples Complete Buffer Figure 2-8. -
Page 24: Ai Pause Trigger Signal
The source also can be one of several other internal signals on your DAQ device. Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW Help for more information. © National Instruments Corporation 2-17 NI PXIe-4300 User Manual... -
Page 25: Getting Started With Ai Applications In Software
Chapter 2 Using the NI PXIe-4300 Routing AI Pause Trigger Signal to an Output Terminal You can route AI Pause Trigger out to any PXI_Trig <0..7>, PXI_STAR, or PXIe_DSTARC terminal. Pause triggers are only sensitive to the level of the source, not the edge. Note Getting Started with AI Applications in Software You can use the NI PXIe-4300 modules in the following analog input applications:... -
Page 26: External Reference Clock
Do not disconnect an external reference clock once the modules have been synchronized or are used by a task. Doing so may cause NI-DAQmx to return an error. Make sure that all tasks using a reference clock are stopped before disconnecting it. © National Instruments Corporation 2-19 NI PXIe-4300 User Manual... -
Page 27: 10 Mhz Reference Clock
Chapter 2 Using the NI PXIe-4300 10 MHz Reference Clock The 10 MHz reference clock can be used to synchronize other devices to the NI PXIe-4300 module. The 10 MHz reference clock can be routed to the PXI_Trig <0..7> terminals. Other devices connected to the PXI_Trig bus can use this signal as a clock input. -
Page 28: Triggering
The analog trigger signal can be used as a reference trigger only. This restriction is due to the fact that the analog trigger circuit operates on digitized ADC data, requiring the acquisition to be running in order for the analog trigger circuit to operate. In a reference triggered © National Instruments Corporation 2-21 NI PXIe-4300 User Manual... -
Page 29: Figure 2-12. Analog Trigger Level
Chapter 2 Using the NI PXIe-4300 acquisition, you configure the device to acquire a certain number of pre-trigger samples and a certain number of post-trigger samples. The trigger circuit generates an internal digital trigger based on the input signal and the user-defined trigger levels. -
Page 30: Figure 2-13. Analog Edge Triggering With Hysteresis On Rising Slope
4.2 V to arm the trigger. The trigger asserts as the signal falls below 3.2 V and deasserts when it rises above 4.2 V, as shown in Figure 2-14. 4.2 V Hysteresis 3.2 V Level Analog Comparison Reference Trigger Figure 2-14. Analog Edge Triggering with Hysteresis on Falling Slope © National Instruments Corporation 2-23 NI PXIe-4300 User Manual... -
Page 31: Digital Input Triggering
Chapter 2 Using the NI PXIe-4300 Window Triggering A window trigger occurs when an analog signal either passes into (enters) or passes out of (leaves) a window defined by two levels. Specify the levels by setting a value for the top and bottom window boundaries. -
Page 32: Accessory Auto-Detection
115 V for U.S. or 230 V for Europe. Do not connect the NI PXIe-4300 module to signals or use for measurements within Measurement Categories III or IV. © National Instruments Corporation 2-25 NI PXIe-4300 User Manual... -
Page 33: Ni Sc Express Considerations
PXI measurement or control system. The PXI backplane is responsible for generating PXI_CLK10 independently to each peripheral slot in a PXI chassis. PXI_CLK10 cannot be used as a reference clock for SC Express modules. Note © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 34: Pxi Triggers
Chapter 3 NI SC Express Considerations PXI Triggers A PXI chassis provides eight bused trigger lines to each module in a system. Triggers may be passed from one module to another, allowing precisely timed responses to asynchronous external events that are being monitored or controlled. Triggers can be used to synchronize the operation of several different PXI peripheral modules. -
Page 35: Data Transfer Methods
Programmed I/O—Programmed I/O is a data transfer mechanism where the user’s program is responsible for transferring data. Each read or write call in the program initiates the transfer of data. Programmed I/O is typically used in software-timed (on-demand) operations. © National Instruments Corporation NI PXIe-4300 User Manual... -
Page 36: Technical Support And Professional Services
Technical Support and Professional Services Visit the following sections of the award-winning National Instruments Web site at ni.com for technical support and professional services: • Support—Technical support at includes the following resources: ni.com/support – Self-Help Technical Resources—For answers and solutions, visit ni.com/... - Page 37 Appendix A Technical Support and Professional Services If you searched and could not find the answers you need, contact your local office or ni.com NI corporate headquarters. Phone numbers for our worldwide offices are listed at the front of this manual. You also can visit the Worldwide Offices section of ni.com/niglobal access the branch office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events.