National Instruments R Series User Manual
Multifunction reconfigurable i/o device
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Also See for R Series:
- User manual (72 pages) ,
- Getting started manual (12 pages) ,
- Getting started manual (10 pages)
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Summary of Contents for National Instruments R Series
- Page 1 USB-7846 User Manual 2025-01-30...
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Page 2: Table Of Contents
Mounting R Series USB Devices ........ -
Page 3: Ni Usb-7846R 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. Electromagnetic Compatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility (EMC) as stated in the product specifications. -
Page 4: Hardware Overview
USB-7846 User Manual Notice To ensure the specified EMC performance, operate this product only with shielded cables and accessories. Caution To ensure the specified EMC performance, you must install the included snap-on ferrite bead onto the DC power cord of the power supply as described in the getting started guide. -
Page 5: Connectivity Options
(189588-01, 1 meter) I/O connector 68-conductor (782536-01) block cable (189588-02, 2 meter) A 68-pin, shielded NI SHC68-C68-RDIO2 A shielded, digital NI SCB-68 HSDIO high-speed (156166-01, 1 meter) I/O 68-conductor (782914-01) digital connector cable block (156166-02, 2 meter) © National Instruments... -
Page 6: Analog Input
USB-7846 User Manual 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. Connecting Single-Ended Voltage Signals To connect referenced single-ended voltage signals to the NI USB-7846R, you must connect the voltage ground signal to AI GND in order to keep the common-mode... -
Page 7: 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 Connection NI USB-7846R Accessory Digital I/O © National Instruments... - Page 8 USB-7846 User Manual The NI USB-7846R provides connections for 48 digital input/output (DIO) channels. Connector 0 contains 32 high-speed DIO channels that can run up to 80 MHz signal frequencies and Connector 1 contains 16 low-speed channels that can run up to 10 MHz signal frequencies.
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Page 9: Field Wiring Considerations
• Protect signal lines from magnetic fields caused by electric motors, welding equipment, breakers, or transformers by running them through special metal conduits. • To minimize signal-to-signal skew within each digital channel, maintain signal lines' length within 1 inch of difference. © National Instruments... -
Page 10: Mounting R Series Usb Devices
USB-7846 User Manual Mounting R Series USB Devices You can use your R Series USB device on a desktop, mount it on a wall, or mount it on a DIN rail. Panel or Wall Mounting Complete the following steps to panel or wall mount your NI USB-7846R. You can purchase the panel mounting kit at ni.com with part number 781514-01. -
Page 11: Leds
Figure 11. Attaching the DIN Rail Clip to the Backpanel Wall Mount LEDs The NI USB-7846R has six LEDs that reflect the device state. Table 2. LED Descriptions Symbol Description Solid blue when the POWER power is on Solid blue when the USB READY USB is ready © National Instruments... -
Page 12: +5 V Power Source
Never connect the +5 V power terminals to analog or digital ground or 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 Refer to the LabVIEW FPGA Module Help for more information about downloading an FPGA 1. The Host VI errors out if you do not call the Close FPGA VI Reference Function without aborting or resetting the FPGA VI. © National Instruments...
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Page 14: Ni Services
NI product. Product registration facilitates technical support and ensures that you receive important information updates from NI corporate headquarters is located at 11500 N Mopac Expwy, Austin, TX, 78759-3504, USA. ni.com © 2025 National Instruments Corporation.
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