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National Instruments PXIe-6614 User Manual
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National Instruments PXIe-6614 User Manual

National Instruments PXIe-6614 User Manual

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NI PXIe-6614
PXI Counter/Timer Module
A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
• C r i t i c a l a n d e x p e d i t e d s e r v i c e s
• I n s t o c k / R e a d y - t o - s h i p
Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate, representative, or authorized distributor for any manufacturer listed herein.
Limited Availability
New From Surplus Stock
Open Web Page
https://www.artisantg.com/95276-2
• We b u y y o u r e x c e s s , u n d e r u t i l i z e d , a n d i d l e e q u i p me n t
• F u l l - s e r v i c e , i n d e p e n d e n t r e p a i r c e n t e r

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Summary of Contents for National Instruments PXIe-6614

  • Page 1 NI PXIe-6614 PXI Counter/Timer Module Limited Availability New From Surplus Stock Open Web Page https://www.artisantg.com/95276-2 A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
  • Page 2 NI 6612 User Manual NI 6612 User Manual November 2013 374008B-01 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 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 the Info Code ni.com/info...
  • Page 4 Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control.
  • Page 5 ™ The ExpressCard word mark and logos are owned by PCMCIA and any use of such marks by National Instruments is under license. The mark LabWindows is used under a license from Microsoft Corporation. Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
  • Page 6 Furthermore, any modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules.
  • Page 7 DO Start Trigger Signal.................... 2-14 Retriggerable DO....................2-14 Using a Digital Start Trigger ................2-14 Routing DO Start Trigger Signal to an Output Terminal ......... 2-14 © National Instruments | vii Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 8 Contents DO Pause Trigger Signal ..................2-15 Using a Digital Pause Trigger................2-15 Routing DO Pause Trigger Signal to an Output Terminal........ 2-15 I/O Protection........................2-16 DI Change Detection ......................2-16 DI Change Detection Applications ................2-17 Digital Filtering......................... 2-17 Connecting Digital I/O Signals..................
  • Page 9 Using PFI Terminals as Static Digital I/Os ..............4-3 Using PFI Terminals to Digital Detection Events ............4-3 Connecting PFI Input Signals................... 4-3 PFI Filters ......................... 4-3 © National Instruments | ix Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 10 Contents I/O Protection........................4-5 Signal Integrity Considerations ..................4-5 Chapter 5 Counter Signal Routing and Clock Generation Clock Routing ........................5-1 100 MHz Timebase....................5-2 20 MHz Timebase..................... 5-2 100 kHz Timebase ....................5-2 External Reference Clock ..................5-2 10 MHz Reference Clock ..................5-3 PXIe_CLK100 (NI PXIe-6612 Only)...............5-3 PXIe_SYNC100 (NI PXIe-6612 Only) ..............
  • Page 11 NI 6612 User Manual Appendix B Technical Support and Professional Services © National Instruments | xi Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 12 NI-DAQmx concepts, and common applications that are applicable to all programming environments. NI-DAQmx is the software you use to communicate with and control your DAQ device. Select Start»All Programs»National Instruments»NI-DAQ»NI-DAQmx Help. • Measurement & Automation Explorer Help—Contains information about configuring and testing supported NI devices using Measurement &...
  • Page 13 If unshielded cables or accessories are not properly installed and shielded, the EMC specifications for the product are no longer guaranteed. © National Instruments | 1-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 14 Chapter 1 Introduction Table 1-1 provides a list of accessories and cables available for use with the NI 6612. Table 1-1. Accessories and Cables Accessory Description SH68-68-D1 Shielded 68-conductor cable R6868 Unshielded 68-conductor flat ribbon cable BNC-2121 BNC connector block with built-in test features CA-1000 Configurable connector accessory SCB-68A...
  • Page 15 Direction and function of each terminal individually controllable Static digital input and output DI change detection trigger/interrupt High-speed digital waveform acquisition — High-speed digital waveform generation — © National Instruments | 2-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 16 Chapter 2 Digital I/O Figures 2-1 and 2-2 show the circuitry of a DIO line on Port 0 and Port 1 respectively. Each DIO line is similar. Figure 2-1. Digital I/O Circuitry on Port 0 DO Waveform Generation FIFO DO Sample Clock Static DO Buffer I/O Protection...
  • Page 17 The time between samples can be much shorter. • The timing between samples is deterministic. • Hardware-timed acquisitions can use hardware triggering. © National Instruments | 2-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 18 Chapter 2 Digital I/O Hardware-timed operations can be buffered or hardware-timed single point. A buffer is a temporary storage in computer memory for to-be-transferred samples. • Buffered—Data is moved from the DAQ device’s onboard FIFO memory to a PC buffer using DMA before it is transferred to application memory.
  • Page 19 By default, the programmable clock divider drives DI Sample Clock (see Figure 2-3). You can route many signals to DI Sample Clock. To view the complete list of possible routes, see the © National Instruments | 2-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 20 Chapter 2 Digital I/O Device Routes tab in MAX. Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW Help for more information. If the NI 6612 receives a DI Sample Clock when the FIFO is full, it reports an overflow error to the host software.
  • Page 21 Waveform information from LabVIEW does not reflect the delay between Note triggers. They are treated as a continuous acquisition with constant t0 and dt information. Reference triggers are not retriggerable. © National Instruments | 2-7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 22 Chapter 2 Digital I/O Using a Digital Source To use DI Start Trigger with a digital source, specify a source and an edge. You can route many signals to DI Start Trigger. To view the complete list of possible routes, see the Device Routes tab in MAX.
  • Page 23 Figure 2-7. In the figure, T represents the period, and A represents the unknown time between the clock pulse and the posttrigger. © National Instruments | 2-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 24 Chapter 2 Digital I/O Figure 2-7. Halt (Internal Clock) and Free Running (External Clock) T – A DI Sample Clock DI Pause Trigger Halt. Used on Internal Clock DI External Sample Clock DI Sample Clock DI Pause Trigger Free Running. Used on External Clock Using a Digital Source To use DI Pause Trigger, specify a source and a polarity.
  • Page 25 If the program does not write new data to the buffer at a fast enough rate to keep up with the generation, the buffer underflows and causes an error. © National Instruments | 2-11 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 26 Chapter 2 Digital I/O • With FIFO regeneration, the entire buffer is downloaded to the FIFO and regenerated from there. After the data is downloaded, new data cannot be written to the FIFO. To use FIFO regeneration, the entire buffer must fit within the FIFO size.
  • Page 27 Routing in MAX in the NI-DAQmx Help or the LabVIEW Help for more information. DO Sample Clock Timebase is not available as an output on the I/O connector. © National Instruments | 2-13 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 28 Chapter 2 Digital I/O You might use DO Sample Clock Timebase 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 DO Sample Clock rather than DO Sample Clock Timebase.
  • Page 29 Routing DO Pause Trigger Signal to an Output Terminal DO Pause Trigger can be routed out to any RTSI <0..7>, PXI_Trig <0..7>, PFI <0..39>, or PXIe-DSTARC terminal. © National Instruments | 2-15 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 30 Chapter 2 Digital I/O I/O Protection Each DIO and PFI signal has limited protection against overvoltage, undervoltage, and overcurrent conditions as well as ESD events. Avoid these fault conditions by following these guidelines: • When configuring a PFI or DIO line as an output, do not connect it to any external signal source, ground, or power supply.
  • Page 31 © National Instruments | 2-17 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 32 Chapter 2 Digital I/O Table 2-3. Filters Pulse Width Pulse Width Guaranteed to Guaranteed to Not Filter Settings Filter Clocks Pass Filter Pass Filter Short 12.5 MHz 160 ns 80 ns Medium 195/3125 kHz 10.24 μs 5.12 μs High 390.625 Hz 5.12 ms 2.56 ms None...
  • Page 33 Figure 2-15. Case 2 Not Stable Not Stable Digital Input P0.A Digital Input P0.B Filter Clock Filtered Input A Filtered Input B © National Instruments | 2-19 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 34 Chapter 2 Digital I/O Figure 2-16 illustrates the difference between line and bus filtering. Figure 2-16. Line and Bus Filtering Digital Input P0.A Digital Input P0.B Filter Clock Filtered Input A Filtered Input B 2A With line filtering, filtered input A would ignore the glitch on digital input P0.B and transition after two filter clocks.
  • Page 35 You can use examples to develop a new application or add example code to an existing application. © National Instruments | 2-21 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 36 Chapter 2 Digital I/O To locate LabVIEW, LabWindows/CVI, Measurement Studio, Visual Basic, and ANSI C examples, refer to the KnowledgeBase document, Where Can I Find NI-DAQmx Examples?, by going to and entering the Info Code ni.com/info daqmxexp For additional examples, refer to zone.ni.com Signal Integrity Considerations Refer to the...
  • Page 37 For measurements using a sample clock, you must configure the NI 6612 to route a signal to the sample clock input of the counter. The NI 6612 does not have a dedicated circuit to generate a © National Instruments | 3-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 38 Chapter 3 Counters counter sample clock. You can route an external signal or one of many different internal signals as the sample clock. For example, you can generate a signal using one counter and route that signal to the sample clock of another counter. Refer to Chapter 5, Counter Signal Routing and Clock Generation, for more information about which signals can be used as the source.
  • Page 39 Clock) VI or function. With this VI or function, you can set the source of the Sample Clock, the rate of the Sample Clock, and the number of samples to acquire. © National Instruments | 3-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 40 Chapter 3 Counters On each sample clock, the device stores the current count value in a buffer. Use DAQmx Read to read the values from this buffer. Figure 3-4 shows an example using Sample Clock Timing. Figure 3-4. Edge Counting: Sample Clock Timing Start Task Signal to Measure Count...
  • Page 41 CI.CountEdges.CountReset.Active Edge set to rising edge, and CI.CountEdges.ResetCnt set to 3. Figure 3-7. Edge Counting: Using a Reset Trigger Start Task Signal to Measure Count Count Reset Terminal © National Instruments | 3-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 42 Chapter 3 Counters Other Settings You can filter noise on any PFI signal that is an input to the counter by enabling a filter. Refer to the PFI Filters section in Chapter 4, PFI, for more information. If you route the same PFI signal to multiple destinations, you should enable the Synchronization feature.
  • Page 43 – CI.Pulse.Freq.Term – CI.Pulse.Time.Term – CI.Pulse.Ticks.Term © National Instruments | 3-7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 44 Chapter 3 Counters • To specify on which edge, rising or falling, to begin the measurement, select the appropriate property from the following list that corresponds to the type of channel created, and then set this property to rising or falling. –...
  • Page 45 Figure 3-11. Pulse Measurement: Using Arm Start Trigger DAQmx DAQmx Start Task Read Arm Start Trigger Signal to Meaure Counter Timebase Buffer Read Value © National Instruments | 3-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 46 Chapter 3 Counters Other Settings The counter measures the pulse using the Counter Timebase signal. By default, the counter uses an onboard 100 MHz signal as the timebase. To change the timebase, use the CI.CtrTimebaseSrc DAQmx Channel property. You can filter noise on any PFI signal that is an input to the counter by enabling a filter. Refer to the PFI Filters section in Chapter 4, PFI, for more information.
  • Page 47 In both cases, the frequency, f, is given by: -- - Figure 3-13. Frequency Measurement Using Time measurement duration = 100 µs Counter Timebase (100 MHz) Signal to Measure Count © National Instruments | 3-11 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 48 Chapter 3 Counters Figure 3-14. Frequency Measurement Using Periods measurement duration = 3 periods Signal to Measure Counter Timebase (100 MHz) Count Trade-offs Consider the following trade-offs when determining the method of measuring frequency: • Accuracy vs. Update Rate Increasing measurement duration increases the accuracy of the measurement. Decreasing measurement duration allows the counter to update the measurement more often.
  • Page 49 100 MHz clock as the timebase. To change the signals used for this measurement, configure the following: • CI.Freq.Term—The signal-to-measure comes from an input terminal. To change the signal-to-measure, set this property to a different terminal. © National Instruments | 3-13 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 50 Chapter 3 Counters • CI.CtrTimebase.Src—To change the signal used as the counter timebase, set this property to a different terminal. Sample Clock (without Averaging) With this method, for each sample clock the counter detects the last full period of the signal-to-measure that occurs before the sample clock.
  • Page 51 • CI.CtrTimebase.Src—To change the signals used as the counter timebase, set this property to a different terminal. © National Instruments | 3-15 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 52 Chapter 3 Counters Large Range with 2 Counters This measurement method requires two counters: Counter N and Counter M. For this measurement method, Counter N creates a pulse equal to T1 periods of the signal-to-measure. The device routes this pulse to Counter M. Counter M measures the duration of this pulse by counting the number of cycles (T2) of the timebase.
  • Page 53 If the frequency of the signal-to-measure is fx, the duration of the pulse is given by: Solving for fx returns the frequency of the signal-to-measure: -- - © National Instruments | 3-17 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 54 Chapter 3 Counters Figure 3-19. Frequency Measurement: High Frequency with Two Counters Counter Pulse Source Timebase (f ) k Counter M Source Counter N Signal to Gate Measure Pulse … Signal to Measure (f ) With the known measurement time (T), which can be configured in CI.Freq.MeasTime, the maximum error and maximum frequency error for this method are given by: ×...
  • Page 55 © National Instruments | 3-19 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 56 Chapter 3 Counters Channel Settings By default, the counter: • measures pulses on a default PFI terminal. Refer to Chapter 5, Counter Signal Routing and Clock Generation, for more information. • measures a high pulse. That is, the counter begins measuring the time from a rising edge to the next falling edge.
  • Page 57 Set ArmStart.DigEdge.Src to select which signal to use as the ArmStartTrigger. Set ArmStart.DigEdge.Edge to select the rising or falling edge of the signal. © National Instruments | 3-21 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 58 Chapter 3 Counters Figure 3-23 shows an example of a Pulse-Width measurement using an Arm Start Trigger. Note that if the counter is armed while the signal-to-measure is already in the active state, the counter will wait to perform the measurement on the next full pulse after the Arm Start Trigger. Figure 3-23.
  • Page 59 The measurements are stored in a buffer. Each call to DAQmx Read returns values from this buffer. Figure 3-25 shows an example of Implicit timing. © National Instruments | 3-23 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 60 Chapter 3 Counters Figure 3-25. Two-Edge Separation Measurement: Implicit Timing First Signal Second Signal Counter Timebase Counter Value Buffer To use Implicit timing, use the DAQmx Timing (Implicit) VI or function. Sample Clock With Sample Clock timing, on each active edge of the sample clock, the device stores one measurement.
  • Page 61 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 3-29. © National Instruments | 3-25 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 62 Chapter 3 Counters Figure 3-29. X4 Encoding Ch A Ch B Counter Value 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 63 To change the source of the A, B, or Z signal, set the relevant DAQmx Channel property: • CI.Encoder.AInputTerm • CI.Encoder.BInputTerm • CI.Encoder.CInputTerm © National Instruments | 3-27 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 64 Chapter 3 Counters Timing Settings The timing settings determine when the device reads the encoder. On-Demand By default, the counter uses On-Demand (no sample clock) timing. The counter starts counting when software calls DAQmx Start Task. Each time software calls DAQmx Read, the NI 6612 returns the current angle of the encoder.
  • Page 65 Generating a periodic waveform with constant frequency and duty cycle. • Generating a periodic waveform with variable frequency and duty cycle. • Generating a complex digital waveform or timing pattern. © National Instruments | 3-29 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 66 Chapter 3 Counters Figure 3-34. Samples of Counter Output Applications A: Output B: Output C: Output Series of pulses Periodic waveform Complex waveform or timing pattern Generating a Series of One or More Pulses The NI 6612 can generate a series of one or more pulses, where each pulse is the same duration. Create Channel You specify the characteristics of the pulses when you create the channel.
  • Page 67 This filter eliminates noise on the start trigger signal. Refer to Chapter 4, PFI, for more information. © National Instruments | 3-31 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 68 Chapter 3 Counters • Start.Retriggerable—Enables a retriggerable generation. After the NI 6612 generates a series of pulses, it monitors the Start Trigger input. When the NI 6612 receives another Start Trigger, it generates the same series of pulses again. Figure 3-37 shows an example of retriggerable generation.
  • Page 69 This filter eliminates noise on the start trigger signal. Refer to Chapter 4, PFI, for more information. © National Instruments | 3-33 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 70 Chapter 3 Counters Generating a Waveform with Variable Frequency and Duty Cycle Figure 3-40 shows an example of a waveform with variable frequency and duty cycle. Figure 3-40. Waveform with Variable Frequency and Duty Cycle Sample 1 Sample 2 Initial Frequency, (Frequency 1, (Frequency 2, Duty Cycle...
  • Page 71 • update the buffer while the device is generating waveforms. Refer to the Buffering topic in the NI-DAQmx Help for more information. © National Instruments | 3-35 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 72 Chapter 3 Counters Generating Complex Digital Waveform or Timing Pattern A complex digital waveform or timing patterns consists of a series of pulses. Each pulse consists of an idle time and active time. To specify the waveform, create a buffer with multiple points. Each point consists of the idle time and active time of one pulse of the waveform.
  • Page 73 Route the input signal, f, to be the counter timebase using the Co.CtrTimebaseSrc DAQmx Channel property. • Create the channel in terms of ticks. © National Instruments | 3-37 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 74 Chapter 3 Counters Frequency Generator To generate a square wave of a fixed frequency you can use a counter to create a continuous pulse train. Refer to the Generating a Waveform with Constant Frequency and Duty Cycle section for more information. In addition to the eight counters, the NI 6612 has a dedicated Frequency Generator circuit.
  • Page 75 The voltage input and output levels and the current drive levels of the PFI signals are listed in the specifications of your device. © National Instruments | 4-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 76 Chapter 4 Using PFI Terminals as Timing Input Signals Use PFI terminals to route external timing signals to many different functions. Each PFI terminal can be routed to any of the following signals: • Counter input signals for all counters—Source, Gate, Aux, HW_Arm, A, B, Z •...
  • Page 77 PXIe-DSTAR<A, B> signal. When the filters are enabled, your device samples the input on each rising edge of a filter clock. Your device uses an onboard oscillator to generate the filter clock. © National Instruments | 4-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 78 Chapter 4 The following is an example of low to high transitions of the input signal. High-to-low transitions work similarly. Assume that an input terminal has been low for a long time. The input terminal then changes from low to high, but glitches several times. When the filter clock has sampled the signal high on N consecutive edges, the low to high transition is propagated to the rest of the circuit.
  • Page 79 Figure 4-5. © National Instruments | 4-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 80 Chapter 4 Figure 4-5. Twisted-Pair Wiring 68-Pin Screw Terminal Accessory Output of External Device PFI 39 Pin 2 Pin 36 The NI 6612 has 40 PFI pins. Each PFI pin is paired with a particular GND pin. The SH68-68-D1 cable twists each PFI pin with its corresponding GND pin. Table 4-2 shows the corresponding GND pin for each PFI pin.
  • Page 81 PFI 34 / P1.2 PFI 35 / P1.3 PFI 36 / P1.4 PFI 37 / P1.5 PFI 38 / P1.6 PFI 39 / P1.7 © National Instruments | 4-7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 82 RTSI <0..7> Timebase PXI_Trigger <0..7> 20 MHz PXIe_CLK100 ÷ 5 Timebase PXI_STAR 100 kHz ÷ 200 PXIe-DSTAR<A, B> Timebase DAQmx Timing Property RefClk.Src © National Instruments | 5-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 83 Chapter 5 Counter Signal Routing and Clock Generation 100 MHz Timebase The 100 MHz Timebase can be used as the timebase for all internal subsystems. The 100 MHz Timebase is generated from one of the following sources: • Onboard oscillator. •...
  • Page 84 By default, DAQmx routes certain PFI signals to and from each of the counters. Tables 5-1 and 5-2 show the default routing for counter signals. © National Instruments | 5-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 85 Chapter 5 Counter Signal Routing and Clock Generation Table 5-1. Default Routing for Counter Input Signals Measurement Ctr0 Ctr1 Ctr2 Ctr3 Ctr4 Ctr5 Ctr6 Ctr7 Count Edges PFI 39 PFI 35 PFI 31 PFI 27 PFI 23 PFI 19 PFI 15 PFI 11 Edges Count Direction...
  • Page 86 NI 6612 in Measurement & Automation Explorer (MAX). To view this table: Launch Measurement & Automation Explorer (MAX) by navigating to Start» All Programs»National Instruments»Measurement & Automation Explorer, or by clicking Measurement & Automation Explorer from NI Launcher. (Windows 8) Expand My System»Devices and Interfaces in the configuration tree on the left to view...
  • Page 87 Chapter 5 Counter Signal Routing and Clock Generation Table 5-3. Matching Routing Terminology (Continued) NI-DAQmx Property Counter Input Signal CI.Freq.Term Low Frequency with 1 Counter or when CtrnGate using Sample Clock Large Range with Two Counter or CtrnSource High Frequency with Two Counters CI.Pulse.Freq.Term CtrnGate CI.Pulse.Ticks.Term...
  • Page 88 • Share trigger signals between devices Many National Instruments DAQ, motion, vision, and CAN devices support RTSI. In a PCI Express system, the RTSI bus consists of the RTSI bus interface and a ribbon cable. The bus can route timing and trigger signals between several functions on as many as five DAQ, vision, motion, or CAN devices in the computer.
  • Page 89 Chapter 5 Counter Signal Routing and Clock Generation Table 5-4. RTSI Signals (Continued) RTSI Bus Signal Terminal RTSI 3 RTSI 2 RTSI 1 RTSI 0 Not Connected. Do not connect signals to 1 to 18 these terminals. D GND 19, 21, 23, 25, 27, 29, 31, 33 Using RTSI as Outputs RTSI <0..7>...
  • Page 90 The NI 6612 device receives the PXI_STAR signal from a Star Trigger controller in a different slot of the PXI Chassis. Refer to the PXI Express Specification at for more www.pxisa.org information. PXI_STAR is an input signal. © National Instruments | 5-9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 91 Chapter 5 Counter Signal Routing and Clock Generation PXIe-DSTAR<A..C> PXI Express devices can provide high-quality and high-frequency point-to-point connections between each slot and a system timing slot. These connections come in the form of three low-voltage differential star triggers that create point-to-point, high-frequency connections between a PXI Express system timing module and a peripheral device.
  • Page 92 FIFO. This allows the buses involved in the transfer to operate independently for maximum performance. Data is transferred simultaneously between the ports. The DMA controller supports burst transfers to and from the FIFO. © National Instruments | 6-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 93 Chapter 6 Bus Interface Each DMA controller supports several features to optimize PCI Express and PXI Express bus utilization. The DMA controllers pack and unpack data through the FIFOs. The DMA controllers also automatically handle unaligned memory buffers on PXI Express. •...
  • Page 94 Calibration For the NI 6612, calibration is not required. © National Instruments | 7-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 95 Figure A-1 shows the NI PCIe/PXIe-6612 pinout. The descriptions beside each pin are in the following format: Signal Name / DIO Context / Counter Context (Default). © National Instruments | A-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 96 Appendix A Pinout and Signal Descriptions Figure A-1. NI 6612 Pinout 34 68 PFI 31/P0.31/CTR 2 SOURCE D GND 33 67 D GND PFI 30/P0.30/CTR 2 GATE 32 66 PFI 28/P0.28/CTR 2 OUT PFI 29/P0.29/CTR 2 AUX 31 65 PFI 27/P0.27/CTR 3 SOURCE D GND 30 64 D GND...
  • Page 97 You can also register for instructor-led, hands-on courses at locations around the world. • System Integration—If you have time constraints, limited in-house technical resources, or other project challenges, National Instruments Alliance Partner members can help. To learn more, call your local NI office or visit ni.com/alliance •...
  • Page 98 Appendix B Technical Support and Professional Services You also can visit the Worldwide Offices section of to access the branch ni.com/niglobal office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. B-2 | ni.com Artisan Technology Group - Quality Instrumentation ...

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