National Instruments cDAQ-9172 User Manual Page 1

USER GUIDE AND SPECIFICATIONSNI cDAQ-9172ContentsIntroduction...

NI cDAQ-9172 User Guide and Specifications 10 ni.comInstalling the SoftwareInstalling NI-DAQmxThe DAQ Getting Started Guide, which you can download at

© National Instruments Corporation 11 NI cDAQ-9172 User Guide and SpecificationsInstalling the NI cDAQ-9172Figure 2 shows the dimensions of the NI cDA

NI cDAQ-9172 User Guide and Specifications 12 ni.comMounting the NI cDAQ-9172You can mount the NI cDAQ-9172 chassis using a desktop, a 35 mm DIN-Rail,

© National Instruments Corporation 13 NI cDAQ-9172 User Guide and SpecificationsNI 9910 DIN-Rail KitThe NI 9910 DIN-Rail Kit contains one clip for mou

NI cDAQ-9172 User Guide and Specifications 14 ni.comcan be used with M4, M5, No. 8, or No.10 panhead screws. Figure 5 illustrates the panel dimensions

© National Instruments Corporation 15 NI cDAQ-9172 User Guide and SpecificationsSetting Up the NI cDAQ-9172Complete the following steps to prepare the

NI cDAQ-9172 User Guide and Specifications 16 ni.com6. Squeeze both C Series I/O module latches, insert the I/O module into the module slot, and press

© National Instruments Corporation 17 NI cDAQ-9172 User Guide and Specifications13. Check that your device appears under Devices and Interfaces. If yo

NI cDAQ-9172 User Guide and Specifications 18 ni.comUsing the NI cDAQ-9172The cDAQ system consists of three parts: C Series I/O modules, the cDAQ modu

© National Instruments Corporation 19 NI cDAQ-9172 User Guide and SpecificationsTo access this KnowledgeBase, go to ni.com/info and enter the info cod

NI cDAQ-9172 User Guide and Specifications 2 ni.comAnalog Input ...

NI cDAQ-9172 User Guide and Specifications 20 ni.comPFI SignalsThe PFI signals, available through correlated digital input and output modules installe

© National Instruments Corporation 21 NI cDAQ-9172 User Guide and Specificationstriggers can come from three separate modules if desired. To find your

NI cDAQ-9172 User Guide and Specifications 22 ni.comUsing an Analog SourceSome C Series I/O modules can generate a trigger based on an analog signal.

© National Instruments Corporation 23 NI cDAQ-9172 User Guide and SpecificationsWhen the reference trigger occurs, the NI cDAQ-9172 continues to write

NI cDAQ-9172 User Guide and Specifications 24 ni.comAI Pause Trigger SignalYou can use the AI Pause Trigger (ai/PauseTrigger) signal to pause and resu

© National Instruments Corporation 25 NI cDAQ-9172 User Guide and SpecificationsFigure 10. Sample Clock Timing OptionsRouting AI Sample Clock to an O

NI cDAQ-9172 User Guide and Specifications 26 ni.comActiveDevs and AI Convert Clock Rate properties using the DAQmx Timing property node or functions.

© National Instruments Corporation 27 NI cDAQ-9172 User Guide and SpecificationsSlow Sample Rate ModulesSome C Series analog input modules are specifi

NI cDAQ-9172 User Guide and Specifications 28 ni.comGetting Started with AI Applications in SoftwareYou can use the NI cDAQ-9172 chassis in the follow

© National Instruments Corporation 29 NI cDAQ-9172 User Guide and SpecificationsSoftware-Timed GenerationsWith a software-timed generation, software c

© National Instruments Corporation 3 NI cDAQ-9172 User Guide and SpecificationsCounter Timing Signals...

NI cDAQ-9172 User Guide and Specifications 30 ni.comOne property of buffered I/O operations is sample mode. The sample mode can be either finite or co

© National Instruments Corporation 31 NI cDAQ-9172 User Guide and SpecificationsAnalog Output Timing SignalsThe NI cDAQ-9172 chassis features the foll

NI cDAQ-9172 User Guide and Specifications 32 ni.commore information, refer to the NI-DAQmx Help. The NI-DAQmx Help is available after installation fr

© National Instruments Corporation 33 NI cDAQ-9172 User Guide and SpecificationsAO Pause Trigger SignalUse the AO Pause trigger signal (ao/PauseTrigge

NI cDAQ-9172 User Guide and Specifications 34 ni.comThe NI-DAQmx Help is available after installation from Start»All Programs»National Instruments»NI-

© National Instruments Corporation 35 NI cDAQ-9172 User Guide and SpecificationsDigital I/OTo use digital I/O, insert a digital I/O C Series module in

NI cDAQ-9172 User Guide and Specifications 36 ni.comStatic DIOEach of the DIO lines can be used as a static DI or DO line. You can use static DIO line

© National Instruments Corporation 37 NI cDAQ-9172 User Guide and SpecificationsUsing an Internal SourceTo use di/SampleClock with an internal source,

NI cDAQ-9172 User Guide and Specifications 38 ni.comBuffered Digital Waveform GenerationA buffer is a temporary storage in computer memory for generat

© National Instruments Corporation 39 NI cDAQ-9172 User Guide and SpecificationsChange Detection EventThe Change Detection Event is the signal generat

NI cDAQ-9172 User Guide and Specifications 4 ni.comIntroductionThis user guide describes how to use the National Instruments cDAQ-9172 chassis and lis

NI cDAQ-9172 User Guide and Specifications 40 ni.comPFIYou can configure channels of a correlated digital module in slots 5 and 6 as Programmable Func

© National Instruments Corporation 41 NI cDAQ-9172 User Guide and SpecificationsFigure 15. NI cDAQ-9172 CountersCounters have seven input signals, al

NI cDAQ-9172 User Guide and Specifications 42 ni.comCounter Input ApplicationsCounting EdgesIn edge counting applications, the counter counts edges on

© National Instruments Corporation 43 NI cDAQ-9172 User Guide and SpecificationsYou can route the pause trigger to the Gate input of the counter. You

NI cDAQ-9172 User Guide and Specifications 44 ni.comControlling the Direction of CountingIn edge counting applications, the counter can count up or do

© National Instruments Corporation 45 NI cDAQ-9172 User Guide and SpecificationsFigure 19 shows an example of a single pulse-width measurement.Figure

NI cDAQ-9172 User Guide and Specifications 46 ni.comNote If you are using an external signal as the Source, at least one Source pulse should occur bet

© National Instruments Corporation 47 NI cDAQ-9172 User Guide and SpecificationsBuffered Period MeasurementBuffered period measurement is similar to s

NI cDAQ-9172 User Guide and Specifications 48 ni.comSemi-Period MeasurementIn semi-period measurements, the counter measures a semi-period on its Gate

© National Instruments Corporation 49 NI cDAQ-9172 User Guide and SpecificationsNote If you are using an external signal as the Source, at least one S

© National Instruments Corporation 5 NI cDAQ-9172 User Guide and SpecificationsSafety GuidelinesOperate the NI cDAQ-9172 chassis only as described in

NI cDAQ-9172 User Guide and Specifications 50 ni.comMethod 1b—Measure Low Frequency With One Counter (Averaged)This method is good for low to medium f

© National Instruments Corporation 51 NI cDAQ-9172 User Guide and SpecificationsMethod 2—Measure High Frequency With Two CountersThis method is good f

NI cDAQ-9172 User Guide and Specifications 52 ni.comYou can route the signal to measure to the Source input of Counter 0, as shown in Figure 27. Assum

© National Instruments Corporation 53 NI cDAQ-9172 User Guide and SpecificationsChoosing a Method for Measuring FrequencyThe best method to measure fr

NI cDAQ-9172 User Guide and Specifications 54 ni.comTable 6 summarizes some of the differences in methods of measuring frequency.For information on co

© National Instruments Corporation 55 NI cDAQ-9172 User Guide and SpecificationsFigure 28 shows a quadrature cycle and the resulting increments and de

NI cDAQ-9172 User Guide and Specifications 56 ni.comChannel Z BehaviorSome quadrature encoders have a third channel, channel Z, which is also referred

© National Instruments Corporation 57 NI cDAQ-9172 User Guide and SpecificationsMeasurements Using Two Pulse EncodersThe counter supports two pulse en

NI cDAQ-9172 User Guide and Specifications 58 ni.comFigure 33 shows an example of a single two-signal edge-separation measurement.Figure 33. Single T

© National Instruments Corporation 59 NI cDAQ-9172 User Guide and SpecificationsCounter Output ApplicationsSimple Pulse GenerationThe counter can outp

NI cDAQ-9172 User Guide and Specifications 6 ni.comRelated DocumentationEach application software package and driver includes information about writin

NI cDAQ-9172 User Guide and Specifications 60 ni.comFigure 36 shows a generation of a pulse with a pulse delay of four and a pulse width of three (usi

© National Instruments Corporation 61 NI cDAQ-9172 User Guide and SpecificationsPulse Train GenerationContinuous Pulse Train GenerationThis function g

NI cDAQ-9172 User Guide and Specifications 62 ni.comFrequency GenerationYou can generate a frequency by using a counter in pulse train generation mode

© National Instruments Corporation 63 NI cDAQ-9172 User Guide and SpecificationsFrequency Output can be routed to any output PFI terminal. The FREQ OU

NI cDAQ-9172 User Guide and Specifications 64 ni.comCounter n Source SignalThe selected edge of the Counter n Source signal increments and decrements

© National Instruments Corporation 65 NI cDAQ-9172 User Guide and SpecificationsRouting Counter n Source to an Output TerminalYou can route Counter n

NI cDAQ-9172 User Guide and Specifications 66 ni.comRouting a Signal to Counter n AuxEach counter has independent input selectors for the Counter n Au

© National Instruments Corporation 67 NI cDAQ-9172 User Guide and Specificationswaiting for the Gate signal when it is armed. Counter output operation

NI cDAQ-9172 User Guide and Specifications 68 ni.comDefault Counter/Timer RoutingCounter/timer signals are available to correlated digital I/O C Serie

© National Instruments Corporation 69 NI cDAQ-9172 User Guide and SpecificationsOther Counter FeaturesCascading CountersYou can internally route the C

© National Instruments Corporation 7 NI cDAQ-9172 User Guide and SpecificationsLabVIEW Getting Started with LabVIEW—describes the LabVIEW graphical pr

NI cDAQ-9172 User Guide and Specifications 70 ni.comYou can configure the filter setting for each input independently. On power up, the filters are di

© National Instruments Corporation 71 NI cDAQ-9172 User Guide and SpecificationsDuplicate Count PreventionDuplicate count prevention (or synchronous c

NI cDAQ-9172 User Guide and Specifications 72 ni.comExample Application That Works Incorrectly (Duplicate Counting)In Figure 44, after the first risin

© National Instruments Corporation 73 NI cDAQ-9172 User Guide and SpecificationsEven if the Source pulses are long, the counter increments only once f

NI cDAQ-9172 User Guide and Specifications 74 ni.comOtherwise, the mode depends on the signal that drives Counter n Source. Table 10 describes the con

© National Instruments Corporation 75 NI cDAQ-9172 User Guide and SpecificationsExternal Source ModeIn external source mode, the chassis generates a d

NI cDAQ-9172 User Guide and Specifications 76 ni.comClock RoutingFigure 49 shows the clock routing circuitry of the NI cDAQ-9172 chassis.Figure 49. N

© National Instruments Corporation 77 NI cDAQ-9172 User Guide and SpecificationsSpecificationsThese specifications are for the NI cDAQ-9172 chassis on

NI cDAQ-9172 User Guide and Specifications 78 ni.comAO waveform modes...Non-periodic waveform,periodic waveform regeneratio

© National Instruments Corporation 79 NI cDAQ-9172 User Guide and SpecificationsDebounce filter settings ... Selectable per inpu

NI cDAQ-9172 User Guide and Specifications 8 ni.comLabWindows™/CVI™LabWindows/CVI HelpData Acquisition book—contains NI-DAQmx measurement concepts and

NI cDAQ-9172 User Guide and Specifications 80 ni.comFrequency Generator (Slots 5 and 6 Only)Number of channels...1Base cl

© National Instruments Corporation 81 NI cDAQ-9172 User Guide and SpecificationsInput voltage range... 11 V to 30 VMaxim

NI cDAQ-9172 User Guide and Specifications 82 ni.comEnvironmentalThe NI cDAQ-9172 chassis is intended for indoor use only. For outdoor use, mount the

© National Instruments Corporation 83 NI cDAQ-9172 User Guide and SpecificationsElectromagnetic CompatibilityThis product is designed to meet the requ

National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on ni.com/legal f

© National Instruments Corporation 9 NI cDAQ-9172 User Guide and SpecificationsDevice Documentation and SpecificationsCheck ni.com/manuals for the mos