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Summary of Contents for NI USB-7846
- Page 1 USB-7846...
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Page 2: Safety Guidelines
This document provides compliance, pinout, connectivity, mounting, and power information for the National Instruments USB-7846R. Safety Guidelines Do not operate the NI USB-7846R in a manner not specified in this user Caution 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. -
Page 3: Hardware Overview
NI USB-7846R Connecting the NI USB-7846R The NI USB-7846R 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.com | NI USB-7846R User Manual... -
Page 4: Connectivity Options
TERMINAL 34 TERMINAL 1 TERMINAL 1 TERMINAL 68 TERMINAL 35 TERMINAL 35 TERMINAL 68 Connectivity Options Use the following connection accessories and cables to access the signals on the I/O connectors. NI USB-7846R User Manual | © National Instruments | 3... -
Page 5: Analog Input
Analog Input The NI USB-7846R 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-7846R. Connect the positive voltage signal to the AI+ and the negative voltage signal to AI-. To connect grounded differential signals to the NI USB-7846R, you must also connect the signal reference to AI GND.
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Page 7: Analog Output
AIGND Connection Accessory NI USB-7846R Analog Output The NI USB-7846R 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-7846R to load a VI when the system powers on. The VI can then set the DIO lines to any power-on state. - Page 9 Separate NI USB-7846R signal lines from high-current or high-voltage lines. These lines can induce currents in or voltages on the NI USB-7846R 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.
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Page 10: Din Rail Mounting
Figure 9. Wall or Panel Mounting the NI USB-7846R DIN Rail Mounting Complete the following steps to mount your NI USB-7846R. 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-7846R. 10 | ni.com | NI USB-7846R User Manual...
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Page 12: Power Source
Never connect the +5 V power terminals to analog or digital ground or Caution any other voltage source on the NI USB-7846R 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: Worldwide Support And Services
The National Instruments website is your complete resource for technical support. At support, you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers. Visit ni.com/services for NI Factory Installation Services, repairs, extended warranty, and other services. - Page 14 Worldwide Offices section of ni.com/niglobal to access the branch office websites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. NI USB-7846R User Manual | © National Instruments | 13...
- Page 15 National Instruments Patent Notice at . You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export ni.com/legal/export-compliance Compliance Information at for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data.
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