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USER GUIDE AND SPECIFICATIONS
NI cDAQ-9172
This user guide describes how to use the National Instruments cDAQ-9172
chassis and lists specifications. For an interactive demonstration of how to
install the NI cDAQ-9172, go to ni.com/info and enter daqinstall.
The NI cDAQ-9172 is an eight-slot USB chassis designed for use
with C Series I/O modules. The NI cDAQ-9172 chassis is capable of
measuring a broad range of analog and digital I/O and sensors using a
Hi-Speed USB 2.0 interface. For module
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Safety Guidelines Operate the NI cDAQ-9172 chassis only as described in this user guide. Note Because some C Series I/O modules may have more stringent certification standards than the NI cDAQ-9172 chassis, the combined system may be limited by individual component restrictions. Refer to the Using the NI cDAQ-9172 section of this document for more details. Caution The NI cDAQ-9172 chassis is not certified for use in hazardous locations. Hot Surface This icon denotes that the component may be
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Installing the NI cDAQ-9172 Figure 2 shows the dimensions of the NI cDAQ-9172 chassis. 19.0 mm 165.1 mm (0.75 in.) (6.50 in.) NATIONAL INSTRUMENTS 36.4 mm NI cDAQ-9172 (1.43 in.) 88.1 mm ON Ready (3.50 in.) 1 2 3 4 5 6 7 8 Active OFF 59.6 mm 51.7 mm (2.35 in.) (2.04 in.) 11-30 VDC 15 W 4.10 mm 254.0 mm (0.16 in.) (10.00 in.) 23.7 mm (0.94 in.) 44.1 mm (1.74 in.) 20.3 mm (0.80 in.) 25.0 mm (0.98 in.) 53.8 mm 44.1 mm (2.12 in.) (1.74 in.) 63.1 mm 46.0 mm (2.49 in.) (1.81 in.) 24.8 mm (0.
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Mounting the NI cDAQ-9172 You can mount the NI cDAQ-9172 chassis using a desktop, a 35 mm DIN-Rail, or a panel mount accessory kit. For accessory ordering information, refer to ni.com. Caution Your installation must meet the following requirements: • Allows 25.4 mm (1 in.) of clearance above and below the NI cDAQ-9172 chassis for air circulation. � Allows 50.8 mm (2 in.) of clearance in front of modules for common connector cabling, such as the 10-terminal detachable screw terminal connector
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Mounting the NI 9910 DIN-Rail Kit The NI 9910 DIN-Rail kit contains one clip for mounting the chassis on a standard 35 mm DIN-Rail. To mount the chassis on a DIN-Rail, fasten the DIN-Rail clip to the chassis using a number 2 Phillips screwdriver and two M4 × 16 screws. The screws are included in the DIN-Rail kit. Make sure the DIN-Rail kit is installed as illustrated in Figure 4, with the larger lip of the DIN-RAIL positioned up. When the DIN-Rail kit is properly installed, the NI cDAQ-917
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screws. Figure 5 illustrates the panel dimensions and installation on the NI cDAQ-9172 chassis. Refer to the documentation included with the NI 9905 shipping kit for more detailed dimensions. 330.2 mm (13.00 in.) NATIONAL INSTRUMENTS NI cDAQ-9172 ON Ready 88.1 mm 1 2 3 4 5 6 7 8 Active OFF (3.47 in.) 11-30 VDC 15 W 48.1 mm 28.1 mm (1.90 in.) (1.11 in.) Figure 5. Panel Mount Dimensions and Installation on the NI cDAQ-9172 NI cDAQ-9172 User Guide and Specifications 6 ni.com
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Setting Up the NI cDAQ-9172 Complete the following steps to prepare the NI cDAQ-9172 chassis for use: 1. Before connecting the hardware, install NI-DAQmx software, VI Logger, and the NI-DAQ Device Documentation Browser. Refer to the DAQ Getting Started Guide for more information about software installation. Note The NI-DAQmx software is included on the CD shipped with your kit and is available for download at ni.com/support. After you install it, the NI-DAQ Device Documentation Browser is
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5. Remove the plastic cover from the connector in any empty module slot. 6. Squeeze both C Series I/O module latches, insert the I/O module into the module slot, and press until both latches lock the module in place. 7. Connect the NI cDAQ-9172 chassis with the supplied USB cable to any available USB port on your computer. 8. Connect the power source to the NI cDAQ-9172 chassis. The NI cDAQ-9172 chassis requires an external power supply that meets the specifications in the Power Requirements
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12. Expand Devices and Interfaces, and then expand NI-DAQmx Devices. 13. Check that your device appears under Devices and Interfaces. If your device does not appear, press to refresh the view in MAX. If your device is still not recognized, refer to ni.com/support/install for troubleshooting information. 14. Right-click your device and select Self-Test. If you need help during the self-test, select Help»Help Topics» NI-DAQmx and click MAX Help for NI-DAQmx. When the self-test finishes,
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Table 2. Ready LED (Continued) LED Definition Green Full-Speed (12 Mbit/sec) Off USB connection is not established Using the NI cDAQ-9172 The cDAQ system consists of three parts: C Series I/O modules, the cDAQ module interface, and the USB-STC2. These components digitize signals, perform D/A conversions to generate analog output signals, measure and control digital I/O signals, and provide signal conditioning. C Series I/O Module cDAQ Module USB- USB Interface STC2 2.0 C Series I/O Modu
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wiring connections directly from the C Series I/O modules to your sensors/actuators. In most cases, the C Series I/O modules provide isolation from channel-to-earth ground. For more information about which C Series I/O modules are compatible with the NI cDAQ-9172 chassis, refer to the KnowledgeBase document, C Series Modules Supported in the NI cDAQ-9172. To access this KnowledgeBase, go toni.com/info and enter the info code rdcdaq. Correlated vs. Static DIO Modules Digital I/O module capab
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through the PFI lines. Refer to the Analog Input Timing Signals and Analog Output Timing Signals sections for more information about the configuration of these signals. Triggering Modes The NI cDAQ-9172 supports different trigger modes, such as start trigger, reference trigger, and pause trigger with analog, digital, or software sources. Refer to the Analog Input Triggering and Analog Output Triggering sections for more information. Independent Data Streams The NI cDAQ-9172 supports four in
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The NI cDAQ-9172 has one AI timing engine, which means that only one analog input task may be running at a time on a chassis. However, the analog input task can include channels from multiple analog input modules. Analog Input Triggering A trigger is a signal that causes an action, such as starting or stopping the acquisition of data. When you configure a trigger, you must decide how you want to produce the trigger and the action you want the trigger to cause. The NI cDAQ-9172 chassis suppo
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The source also can be one of several other internal signals on your NI cDAQ-9172 chassis. Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW Help in version 8.0 or later for more information. The NI-DAQmx Help is available after installation from Start»Programs» National Instruments»NI-DAQ»NI-DAQmx Help. To view the LabVIEW Help, in version 8.0 or later, select Help»Search the LabVIEW Help in LabVIEW. Alternately, to download the LabVIEW Help, go to ni.com/manuals. You al
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be Continuous?, for more information. To access this KnowledgeBase, go to ni.com/info and enter the info code rdcanq. When the reference trigger occurs, the NI cDAQ-9172 continues to write samples to the buffer until the buffer contains the number of posttrigger samples desired. Figure 9 shows the final buffer. Reference Trigger Pretrigger Samples Posttrigger Samples Complete Buffer Figure 9. Reference Trigger Final Buffer Using a Digital Source To use ai/ReferenceTrigger with a digital s
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Routing AI Reference Trigger Signal to an Output Terminal You can route ai/ReferenceTrigger to any output PFI terminal. AI Pause Trigger Signal The Pause Trigger signal can be generated from internal or external sources. Any time the signal deasserts, you can use the Pause Trigger signal to pause the acquisition. You can use the AI Pause Trigger (ai/PauseTrigger) signal to pause and resume a measurement acquisition. The internal sample clock pauses while the external trigger signal is activ
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PFI Analog Comparison Event Ctr n Internal Output ai/SampleClock Sigma-Delta Module Internal Output PFI ai/SampleClock Analog Comparison Timebase Programmable Event Clock Divider 20 MHz Timebase 100 kHz Timebase Figure 10. Sample Clock Timing Options Routing AI Sample Clock to an Output Terminal You can route ai/SampleClock to any output PFI terminal. AI Sample Clock Timebase The AI Sample Clock Timebase (ai/SampleClockTimebase) signal is divided down to provide a source for ai/SampleC
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ActiveDevs and AI Convert Clock Rate properties using the DAQmx Timing property node or functions. Simultaneous Sample-and-Hold Simultaneous sample-and-hold (SSH) C Series analog input modules contain multiple A/D converters or circuitry that allows all the input channels to be sampled at the same time. These modules sample their inputs on every Sample Clock pulse. Sigma-Delta Sigma-delta C Series analog input modules function much like SSH modules, but use A/D converters that require a hi
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module in the cDAQ chassis, the maximum Sample Clock rate can run faster than the maximum rate for the module. When operating at a rate faster than these slow rate modules can support, the slow rate module returns the same point repeatedly, until a new conversion completes. The first point is acquired when the task is committed. The second point is acquired after the start trigger. ai/StartTrigger 1st A/D Conversion 2nd A/D Conversion 3rd A/D Conversion Data from A/D Conversion A B C (Sl
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For more information about programming analog input applications and triggers in software, Refer to the NI-DAQmx Help or the LabVIEW Help in version 8.0 or later for more information. The NI-DAQmx Help is available after installation from Start»Programs» National Instruments»NI-DAQ»NI-DAQmx Help. To view the LabVIEW Help, in version 8.0 or later, select Help»Search the LabVIEW Help in LabVIEW. Alternately, to download the LabVIEW Help, go to ni.com/manuals. Analog Output To generate analog
