Cannot Find Port or Line of My Digital I/O Device in LabVIEW DAQmx Physical Channel Control

Updated Nov 14, 2018

Reported In


  • Digital I/O Device


  • LabVIEW
  • Measurement & Automation Explorer (MAX)

Issue Details

I have a hardware device and it is perfectly recognized in NI MAX; however I can't see the device or connect to it in the LabVIEW DAQmx Physical Channel control. No port or line of my device shows up. Nor can I find any by clicking Browse.


You need to change the default I/O Name Filtering option:
  1. Right click the DAQmx Physical Channel control, choose I/O Name Filtering option.
  2. In the Filter Names panel, choose Digital Input or Digital Output in I/O Type drop down menu.
  3. Choose any option in Port/Line Filtering drop down menu.
  4. Click OK and close the Filter Names panel.

Then you will see the listed ports and lines of your device in DAQmx Physical Channel control when you pull down the drop down menu.

Additional Information

The LabVIEW DAQmx Physical Channel control can only be connected to Analog Input by default, so if you are going to connect it to a digital I/O device, the ports and lines will not show up.


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