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USER GUIDE AND SPECIFICATIONS
NI USB-9481
4-Channel SPST Relay Device
Introduction
This user guide describes how to use the National Instruments USB-9481
and lists the device specifications.
The NI USB-9481 provides a USB interface for four channels of
single-pole single-throw (SPST) form A relays. The NI USB-9481 consists
of two components: an NI 9481 module and an NI USB-9162 carrier,
as shown in Figure 1.
NI 9481
NI USB-9162
Figure 1. NI USB-9481 Components
NI USB-9481
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Related Manuals for National Instruments USB-9481
Summary of Contents for National Instruments USB-9481
- Page 1 USER GUIDE AND SPECIFICATIONS NI USB-9481 4-Channel SPST Relay Device This user guide describes how to use the National Instruments USB-9481 and lists the device specifications. Introduction The NI USB-9481 provides a USB interface for four channels of single-pole single-throw (SPST) form A relays. The NI USB-9481 consists of two components: an NI 9481 module and an NI USB-9162 carrier, as shown in Figure 1.
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Page 2: Safety Guidelines
Operate the NI USB-9481 only as described in these operating instructions. Note Although the NI 9481 module may have more stringent certification standards than the NI USB-9481, when used with the NI USB-9162 carrier, the combined system may be limited. Refer to the Specifications section for more details. -
Page 3: Safety Guidelines For Hazardous Voltages
NI-DAQ. Select Start»All Programs»National Instruments»NI-DAQ» NI-DAQ Readme. The NI-DAQmx Help contains general information about measurement concepts, key NI-DAQmx concepts, and common applications that are applicable to all programming environments. Select Start»All Programs»National Instruments»NI-DAQ»NI-DAQmx Help. © National Instruments Corporation NI USB-9481 User Guide and Specifications... -
Page 4: Measurement Studio
Visual C++, Visual C#, or Visual Basic .NET, you can interactively create channels and tasks by launching the DAQ Assistant from MAX or from within Visual Studio .NET. You can generate the configuration code NI USB-9481 User Guide and Specifications ni.com... -
Page 5: Ansi C Without Ni Application Software
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»National Instruments»NI-DAQ» NI-DAQmx C Reference Help. -
Page 6: Installing The Software
Technical Support on the Web For additional support, refer to ni.com/support zone.ni.com Installing the Software Software support for the NI USB-9481 for Windows 2000/XP/Vista is provided by NI-DAQmx. The DAQ Getting Started Guide, which you can download at , offers NI-DAQmx users step-by-step ni.com/manuals instructions for installing software and hardware, configuring channels and tasks, and getting started developing an application. -
Page 7: Example Programs
Example Programs The NI-DAQmx CD contains example programs that you can use to get started programming with the NI USB-9481. Refer to the NI-DAQmx for USB Devices Getting Started Guide that shipped with your device, and is also accessible from Start»All Programs»National Instruments»... - Page 8 Figure 4. Figure 4. Locking Module into Place Mounting the NI USB-9481 to a Panel Threaded inserts are located in the NI USB-9481 for mounting it to a panel. Refer to Figure 5 for dimensions. 85.7 mm (3.37 in.)
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Page 9: Led Indicator
Connecting the NI USB-9481 to a Computer Plug one end of the USB cable into the NI USB-9481 and the other end into an available USB port on the computer. Refer to the NI-DAQmx for USB Devices Getting Started Guide that shipped with your device, and is also accessible from Start»All Programs»National Instruments»NI-DAQ,... - Page 10 No connection Connecting Loads to the NI USB-9481 You can connect loads to the NI USB-9481. Connect the load to one of the leads of the power source. Connect either the CHa or the CHb terminal to the load and the other terminal to the other lead of the power source.
- Page 11 Connect the leads to the screw terminal and secure with the strain relief. Finish by snapping the backshell around the connector. 1 Strain Relief Figure 7. High Voltage Screw Terminal Backshell Figure 8. Assembled High Voltage Screw Terminal Backshell © National Instruments Corporation NI USB-9481 User Guide and Specifications...
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Page 12: Specifications
Off state leakage ........10 μA max Expected life cycles Mechanical (no load).......20,000,000 typ Electrical (connecting to load)..100,000 typ Power Requirements Current consumption from USB.....500 mA, max Suspend mode........2.5 mA, max Bus Interface USB specification ........USB 2.0 Hi-Speed NI USB-9481 User Guide and Specifications ni.com... -
Page 13: Physical Characteristics
This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: • IEC 61010-1, EN-61010-1 • UL 61010-1, CSA 61010-1 © National Instruments Corporation NI USB-9481 User Guide and Specifications... -
Page 14: Hazardous Locations
, search by model number or product line, and click the ni.com/certification appropriate link in the Certification column. Hazardous Locations The NI USB-9481 is not certified for use in hazardous locations. Environmental The NI USB-9481 device is intended for indoor use only. Operating temperature ......0 to 60 °C Storage temperature ........–40 to 85 °C... -
Page 15: Environmental Management
Waste Electrical and Electronic Equipment (WEEE) At the end of their life cycle, all products must be sent to a WEEE recycling EU Customers center. For more information about WEEE recycling centers and National Instruments WEEE initiatives, visit ni.com/environment/weee.htm RoHS... -
Page 16: Where To Go For Support
Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.
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