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PXIe-8370 PWR LED Flashing Red after Upgrading the Connected PC's Software

Updated Aug 12, 2019

Reported In


  • PXIe-8370
  • PCIe-8371

Issue Details

We have a PXI chassis, controlled from a computer using an MXI-Express remote controller connection. It uses a PXIe-8370 link card in the PXI chassis and a PCIe-8371 link card in the PC.

Recently, we have updated the NI software on the computer. Since then every time we boot up the PC, the link cards' PWR LEDs start to flash red.

We have looked this up and found in the manuals, that this means the power rails of the PXI are operating out of spec. However, this seems to be not the case. Also, the computer's hardware, the PXI rack, and the installed devices have not changed.

How can we make the link cards work again?


The issue described above can occur when using a PXIe-8370 card having the original firmware combined with NI software 2016 or newer. The issue was fixed in the 8370's firmware version 2012.07.10.10.

Follow these steps to upgrade the firmware:
  1. Connect the PXIe-8370 to a computer that uses older versions of NI software (15.0 or older).
    • Assure that all necessary software and drivers are installed for your PXI system.
  2. Download the newest firmware for the PXIe-8370 from here.
  3. Open Measurement & Automation Explorer (NI MAX) on the computer.
  4. Select the PXIe-8370 in NI MAX. (Note: See the Additional Information section in case the link cards start to blink red at this step).
  5. Click Update firmware
  6. Point at the .bin file downloaded in step 2.
  7. After the firmware update has completed: Power down the PXIe chassis.
  8. Remove the PXIe-8370 card from the chassis.
  9. Plug the card in again.

Additional Information

The current firmware version of the PXIe-8370 is shown in NI MAX when selecting the PXIe-8370.

If the link cards' PWR LEDs stays solid green while booting up the PC, but starts blinking red the moment you try to communicate with the PXI from NI MAX, a database reset of NI MAX might be necessary: How to Fix or Reset the NI MAX Database File


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