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Using the Trigger Line on a PXI(e) Controller

Updated Aug 15, 2019

Reported In


  • PXI Controller


  • LabVIEW


  • NI-DAQmx

Issue Details

I have a PXIe card which I need to trigger via hardware. I don't have any other cards besides my PXIe controller which has a trigger input. Is there any way I can use this as my trigger input? 


The following code extract outlines a method that you can use the trigger line for the controller (in this case a PXIe-8880) to trigger the card. 

As of PXI Platform Services 17.3, you can use the SMB terminals on NI PXI(e) controllers for trigger routing. This feature is only for Windows.

The trigger simply needs a short circuit or the release of a short circuit between the negative and positive polarities in order for falling or rising edge trigger to be detected.

Additional Information

The DAQmx Signal Routing VI's are the VI's that can be used to route the signal of the trigger from the controller to the backplane trigger line. From this location the cards within the PXI(e) Chassis can use the signal which comes through the trigger line. Users can reference the SMB connector with the terminal name /[hostname]/TRIG_SMB where [hostname] is the controller's name on the network.


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