National Instruments NI USB-7855R User Manual
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Also See for NI USB-7855R:
- User manual (17 pages) ,
- Note to users (11 pages) ,
- Getting started manual (10 pages)
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Summary of Contents for National Instruments NI USB-7855R
- Page 1 National Instruments USB-7855 Manual Get Pricing & Availability at ApexWaves.com Call Today: 1-800-915-6216 Email: sales@apexwaves.com https://www.apexwaves.com/modular-systems/national-instruments/r-series/USB-7855...
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Page 2: Safety Guidelines
National Instruments USB-7855R. Safety Guidelines Caution Do not operate the NI USB-7855R in a manner not specified in this user manual. Product misuse can result in a hazard. You can compromise the safety protection built into the product if the product is damaged in any way. If the product is damaged, return it to National Instruments for repair. -
Page 3: Hardware Overview
NI USB-7855R Connecting the NI USB-7855R The NI USB-7855R provides connections for eight analog input (AI) channels, eight analog output (AO) channels, and forty-eight digital input/output (DIO) channels, as shown in Figure 2 | NI USB-7855R User Manual | ni.com... -
Page 4: Connectivity Options
TERMINAL 34 TERMINAL 1 TERMINAL 1 TERMINAL 68 TERMINAL 35 TERMINAL 68 TERMINAL 35 Connectivity Options Use the following connection accessories and cables to access the signals on the I/O connectors. NI USB-7855R User Manual | © National Instruments | 3... -
Page 5: Analog Input
Analog Input The NI USB-7855R provides connections for eight AI channels. Each channel has an AI+ pin, AI- pin, and AIGND pin to which you can connect both single-ended or differential voltage signals. Use the AISENSE pin to connect non-referenced single-ended signals. - Page 6 You can connect grounded or floating differential signal sources to the NI USB-7855R. Connect the positive voltage signal to the AI+ and the negative voltage signal to AI-. To connect grounded differential signals to the NI USB-7855R, you must also connect the signal reference to AI GND.
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Page 7: Analog Output
AIGND Connection Accessory NI USB-7855R Analog Output The NI USB-7855R provides connections for eight analog output channels. Each channel has an AO pin and AOGND pin to which you can connect a load. Figure 7. Connecting a Load LOAD AOGND... -
Page 8: Field Wiring Considerations
When the system powers on, the DIO channels are set as input low with pull-down resistors. To set another power-on state, you can configure the NI USB-7855R to load a VI when the system powers on. The VI can then set the DIO lines to any power-on state. -
Page 9: Mounting R Series Usb Devices
Separate NI USB-7855R signal lines from high-current or high-voltage lines. These lines can induce currents in or voltages on the NI USB-7855R signal lines if they run in parallel paths at a close distance. To reduce the magnetic coupling between lines, separate them by a reasonable distance if they run in parallel or run the lines at right angles to each other. -
Page 10: Din Rail Mounting
Figure 9. Wall or Panel Mounting the NI USB-7855R DIN Rail Mounting Complete the following steps to mount your NI USB-7855R. You can purchase a DIN rail mounting clip at with part number 781515-01. ni.com Fasten the DIN rail clip to the back of the backpanel wall mount using a #1 Phillips screwdriver and four machine screws. - Page 11 Solid blue when the USB is ready ERROR Solid red for error cases USER1 Blue, user-defined USER2 Blue, user-defined USER3 Blue, user-defined The following figure shows the LEDs on the front panel of the NI USB-7855R. 10 | NI USB-7855R User Manual | ni.com...
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Page 12: Power Source
Caution Never connect the +5 V power terminals to analog or digital ground or any other voltage source on the NI USB-7855R or any other device. Doing so can damage the device and the computer. National Instruments is not liable for damage resulting from such a connection. -
Page 13: Where To Go For Support
Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the file on your media, or the National Instruments Patent Notice at .