Enable 3.3V output on PXIe-5172R

Updated May 21, 2024

Reported In


  • PXIe-5172


  • LabVIEW FPGA Module


  • LabVIEW Instrument Design Libraries for Reconfigurable Oscilloscopes 16.2

Issue Details

According to the PXIe-5172R oscilloscope card technical documentation it's equipped with +3.3V power output on AUX port. After measurement it turns out that there's no potential between AUX 18 pin and any GND pin. How to enable +3.3V power output on my PXIe-5172R AUX I/O port?



By default +3.3V power output is disabled. It's not possible to change this state directly from the host level.

You can enable and monitor external power by implementing to your FPGA VI the Device Status I/O Node. Setting AUX I/0 Power Enable to TRUE enables the +3.3 V power source from pin 18 on the card's AUX connector.

Additional Information

This functionality is available only when using LabVIEW Instrument Design Libraries for Reconfigurable Oscilloscopes. Support for PXIe-5172R has been added from version 16.2.
It's also possible to monitor overcurrent conditions (200mA maximum) on with AUX I/O Power Fault Node.