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NI PXIe-7865 User Manual

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PXIe-7865
Features
2023-03-31

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Summary of Contents for NI PXIe-7865

  • Page 1 PXIe-7865 Features 2023-03-31...

  • Page 2: Table Of Contents

    Connecting the NI PXIe-7865........

  • Page 3: Ni Pxie-7865 User Manual

    © 2020 National Instruments Corporation. All rights reserved. Refer to the <National Instruments>\_Legal Information directory for information about NI copyright, patents, trademarks, warranties, product warnings, and export compliance. Hardware Overview The following high-level block diagram represents the NI PXIe-7865. Figure 1. NI PXIe-7865 Block Diagram 100 MHz Flash...
  • Page 4 TERMINAL 34 TERMINAL 1 TERMINAL 68 TERMINAL 35 TERMINAL 68 TERMINAL 35 TERMINAL 68 TERMINAL 35 Table 1. NI PXIe-7865 Signal Descriptions Signal Description Positive analog input signal connection Negative analog input signal connection AISENSE Reference connection for NRSE measurements AIGND...

  • Page 5: Connecting The Ni Pxie-7865

    Note The pinout label on the lid of the SCB-68A accessory is incompatible with the NI PXIe-7865. Refer to the NI 78xxR Pinout Labels for the SCB-68A, available at ni.com/manuals for the compatible pinout labels.

  • Page 6: Analog Input

    SCB-68A accessory. Note NI is not liable for connections that exceed any of the maximum ratings of input or output signals on the NI PXIe-7865 and on the computer chassis. Refer to the NI PXIe-7865 Specifications, available at ni.com/info for the maximum input and output ratings for each signal.
  • Page 7 NI PXIe-7865 Connecting Differential Voltage Signals You can connect grounded or floating differential signal sources to the NI PXIe-7865. Connect the positive voltage signal to the AI+ and the negative voltage signal to AI-. To connect grounded differential signals to the NI PXIe-7865, you must also connect the signal reference to AI GND.

  • Page 8: Analog Output

    PXIe-7865 Features To connect floating differential signals to the NI PXIe-7865, you must connect the negative and positive signals to AI GND through 1 MΩ resistors to keep the voltage within the common-mode voltage range. If the voltage source is outside the common-mode voltage range, the NI PXIe-7865 does not read data accurately.

  • Page 9: 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-7865 to load a VI when the system powers on. The VI can then set the DIO lines to any power-on state.

  • Page 10: +5 V Power Source

    Separate NI PXIe-7865 signal lines from high-current or high-voltage lines. ■ These lines can induce currents in or voltages on the NI PXIe-7865 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 11 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. © National Instruments © 2023 National Instruments Corporation.

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