USER GUIDE AND SPECIFICATIONS NI USB-9472 8-Channel, 24 V Logic, Sourcing Digital Output Device This user guide describes how to use the National Instruments NI USB-9472 and lists the device specifications. In this user guide, the NI USB-9472 with screw terminal and the NI USB-9472 with D-SUB are referred to inclusively as the NI USB-9472. Introduction The NI USB-9472 data acquisition device provides a USB interface for eight channels of digital outputs with integrated signal conditioning.
Dimensions Figures 2 and 3 show the NI USB-9472 device dimensions. Hi-Speed USB Carrier NI USB-9162 140.23 mm (5.521 in.) 120.68 mm (4.751 in.) 137.82 mm (5.426 in.) 118.26 mm (4.656 in.) 88.12 mm (3.469 in.) 25.34 25.34 mm (0.998 in.) (0.998) Figure 2. NI USB-9472 (Screw Terminal) Device in Millimeters (Inches) Hi-Speed USB Carrier NI USB-9162 125.76 mm (4.951 in.) 120.68 mm (4.751 in.) 123.38 mm (4.857 in.) 118.26 mm (4.656 in.) 88.12 mm (3.469 in.) 25.34 mm (0.998 in.) Figure 3.
Safety Guidelines Operate the NI USB-9472 only as described in these operating instructions. Although the NI 9472 module may have more stringent certification standards than the NI USB-9472, when used with the NI USB-9162 carrier, the combined system may be limited. Refer to the Specifications section for more details. Note Hot Surface This icon denotes that the component may be hot. Touching this component may result in bodily injury.
Related Documentation Each application software package and driver includes information about writing applications for taking measurements and controlling measurement devices. The following references to documents assume you have NI-DAQmx 8.7 or later, and where applicable, version 7.1 or later of the NI application software.
• Taking Measurements—Contains the conceptual and how-to information you need to acquire and analyze measurement data in LabVIEW, including common measurements, measurement fundamentals, NI-DAQmx key concepts, and device considerations. LabWindows/CVI The Data Acquisition book of the LabWindows/CVI Help contains measurement concepts for NI-DAQmx.
ANSI C without NI Application Software The NI-DAQmx Help contains API overviews and general information about measurement concepts. 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»NationalInstruments»NI-DAQ» NI-DAQmx C Reference Help. .
Training Courses If you need more help getting started developing an application with NI products, NI offers training courses. To enroll in a course or obtain a detailed course outline, refer to ni.com/training. Technical Support on the Web For additional support, refer to ni.com/support or zone.ni.com. Installing the Software Software support for the NI USB-9472 for Windows Vista/XP/2000 is provided by NI-DAQmx. The DAQ Getting Started Guide, which you can download at ni.
3. Align the I/O module with the carrier, as shown in Figure 4. 1 1 High Voltage Screw Terminal Backshell Figure 4. Module Installation 4. Squeeze the latches and insert the NI 9472 module into the NI USB-9162 carrier. 5. Press firmly on the connector side of the NI 9472 module until the latches lock the module into place, as shown in Figure 5. Figure 5. Locking Module into Place NI USB-9472 User Guide and Specifications 8 ni.
Mounting the NI USB-9472 to a Panel Threaded inserts are located in the NI USB-9472 for mounting it to a panel. Refer to Figure 6 for dimensions. 85.7 mm (3.37 in.) 72.2 mm (2.84 in.) Threaded Insert M3 x 0.5 8.5 mm (0.34 in.) Max Depth 76.1 mm (3.00 in.) Figure 6. Module Dimensions in Millimeters (Inches) Connecting the NI USB-9472 to a Computer Plug one end of the USB cable into the NI USB-9472 and the other end into an available USB port on the computer.
Table 1. LED State/Device Status LED State Device Status Not lit Device not connected or in suspend. On, not blinking Device connected, but no module installed. Single-blink Operating normally. Double-blink Operating normally. Quadruple-blink Device error. Refer to ni.com/support. Wiring the NI USB-9472 Device The NI USB-9472 provides connections for eight digital output channels. A high voltage screw terminal backshell must be installed when using hazardous voltages (>42.4 Vpk, 60 VDC).
You must connect an external power supply to the NI USB-9472. This power supply provides the current for the devices you connect to the module. Connect the positive lead of the power supply to the supply terminal or pin, Vsup, and the negative lead of the power supply to the common terminal or pin, COM. The eight digital output channels are internally referenced to COM. Refer to Table 3 for the terminal assignments of the NI USB-9472 with screw terminal.
DO0 Vsup DO1 DO2 Vsup DO3 DO4 Vsup DO5 DO6 Vsup DO7 0 3 4 7 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 COM Vsup COM COM Vsup COM COM Vsup COM COM Vsup COM COM Figure 7. Pin Assignments Connecting Devices to the NI USB-9472 The NI USB-9472 has current sourcing outputs, meaning the DO terminal or pin drives current or applies voltage to the device to which it is connected.
Vsup + External Power _ Supply DO Device COM NI USB-9472 Figure 8. Connecting a Device to the NI USB-9472 When the channel is on, the channel LED is on and the terminal or pin associated with the channel drives a current or applies a voltage to the device. When the channel is off, the channel LED is off and the terminal or pin does not drive current or apply voltage to the device.
Figure 10. Assembled High Voltage Screw Terminal Backshell I/O Protection The NI USB-9472 is short-circuit-proof in accordance with IEC 1131-2 and provides overcurrent protection. Understanding Short-Circuit-Proof Devices Each channel on the NI USB-9472 has circuitry that protects it from current surges resulting from short circuits.
Power Supplies and Overcurrent Conditions If a short-circuit occurs, the current through DO can exceed the current rating for the power supply and the maximum continuous output current for the NI USB-9472. If the power supply you are using with the NI USB-9472 cannot supply more than the guaranteed trip current, the module may be damaged if a short-circuit condition occurs.
I/O protection Voltage ............................................30 V max Reversed voltage .............................None Trip currents Minimum possible trip current ................................6 A Minimum guaranteed trip current ................................
Weight With screw terminal........................ Approx. 250 g (8.8 oz) With D-SUB ................................... Approx. 245 g (8.6 oz) Safety If you need to clean the module, wipe it with a dry towel. Safety Voltages NI USB-9472 with Screw Terminal Channel-to-COM ................................... 30 V max Isolation Channel-to-channel ......................... No isolation between channels Channel-to-earth ground Withstand................................. 2,300 Vrms, 5 seconds max Continuous....
Safety Standards The NI USB-9472 product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: Note • IEC 61010-1, EN-61010-1 • UL 61010-1, CSA 61010-1 For UL and other safety certifications, refer to the product label or visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column.
CE Compliance This product meets the essential requirements of applicable European Directives, as amended for CE marking, as follows: • 2006/95/EC; Low-Voltage Directive (safety) • 2004/108/EC; Electromagnetic Compatibility Directive (EMC) Refer to the Declaration of Conformity (DoC) for this product for any additional regulatory compliance information. To obtain the DoC for this product, visit ni.
Where to Go for Support The National Instruments Web site is your complete resource for technical support. At ni.com/support you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers. National Instruments corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. National Instruments also has offices located around the world to help address your support needs.