Export a Trigger Out of a PXI-4461

Updated Jun 2, 2023



  • PXI-4461

Most data acquisition cards have PFI lines to export and import triggers and signals. However, the PXI-4461 has a PFI line that only works as an input, and can't be used to export triggers. 

Here are some alternatives to export a trigger out of the PXI-4461.

  • Use a PXI Timing Card and Synchronization Module to export the triggers. This is the most accurate and recommended method. 
  • If you have another DSA card like the PXIe-4463 or PXI-4464, you can use it to export the start trigger out of these cards using the PFI lines as outputs. 
  • You can use a DAQ card with PFI lines to export the signal (like an X Series card). This is the less accurate method and should be used only if the two methods above are not an option, or if the timing of this trigger is not critical: 
  1. Use the DAQmx Connect Terminals (VI) to connect the ai/Start Trigger of the PXIe-4461 with the backplane (PXI_Trigger line).
  2. Connect the PFI of the DAQ card to that PXI_Trigger line in the backplane. Here is an example of how it could look like:
  3. ​​​​​​Don't forget to use the DAQmx Disconnect Terminals (VI) in your code to remove the connection when the application stops: