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National Instruments PXIe-7861 User Manual
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National Instruments PXIe-7861 User Manual

National Instruments PXIe-7861 User Manual

R series reconfigurable i/o module (ai, ao, dio) for pxi express
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Summary of Contents for National Instruments PXIe-7861

  • Page 1 PXIe-7861R...

  • Page 2: Hardware Overview

    16 AI, 8 AO, 32 DIO, 1 MS/s AIO, 512 MB DRAM, Kintex-7 160T FPGA This document provides compliance, pinout, connectivity, mounting, and power information for the NI PXIe-7861. Hardware Overview The following high-level block diagram represents the NI PXIe-7861. Figure 1. NI PXIe-7861 Block Diagram 100 MHz Flash DDR3 RAM...
  • Page 3 TERMINAL 1 TERMINAL 34 TERMINAL 1 TERMINAL 35 TERMINAL 68 TERMINAL 68 TERMINAL 35 Table 1. NI PXIe-7861 Signal Descriptions Signal Description Positive analog input signal connection Negative analog input signal connection 2 | ni.com | NI PXIe-7861 User Manual...

  • Page 4: Connectivity Options

    Note more information. The pinout label on the lid of the SCB-68A accessory is incompatible with Note the NI PXIe-7861. Refer to the NI 78xxR Pinout Labels for the SCB-68A, available ni.com/manuals for the compatible pinout labels. Connectivity Options Use the following connection accessories and cables to access the signals on the I/O connectors.

  • Page 5: Analog Input

    Analog Input The NI PXIe-7861 provides connections for 16 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: Connecting Differential Voltage Signals

    Connecting Differential Voltage Signals You can connect grounded or floating differential signal sources to the NI PXIe-7861. Connect the positive voltage signal to the AI+ and the negative voltage signal to AI-. To connect grounded differential signals to the NI PXIe-7861, you must also connect the signal reference to AI GND.
  • Page 7 Accessory Digital I/O The NI PXIe-7861 provides connections for 32 digital input/output (DIO) channels. Connector 0 and Connector 1 each contains 16 low-speed channels that can run up to 10 MHz signal frequencies. Each connector has a fixed logic level of 3.3 V. You can configure each channel as input or output.

  • 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 PXIe-7861 to load a VI when the system powers on. The VI can then set the DIO lines to any power-on state. Visit ni.com/info...

  • Page 9: Worldwide Support And Services

    National Instruments is not liable for damage resulting from such a connection. The power rating is 4.75 to 5.1 V DC at 0.5 A per connector. Worldwide Support and Services The NI website 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.

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