Export a Trigger Out of an NI PXI-4461/4462

Most data acquisition cards have PFI lines to export and import triggers and signals. However, the NI PXI-4461 and PXI-4462 cards have PFI lines that work only as inputs and can't export triggers. 

Here are some alternatives to export a trigger from any of these two cards.

• If you have another DSA card, such as the PXIe-4463 or PXI-4464, or a PXI Timing&Sync Card, you can use it to export the start trigger from these cards using the PFI lines as outputs. 
• You can also use a DAQ card with PFI lines to export the signal (like an X Series card)

1. The easiest method to route your trigger signal is by using the DAQmx Export Signal VI and configuring the parameters as shown below. This approach automatically manages the signal routing for you, reserving and releasing the required paths only while the task is active.
   1. Signal / Signal Name: Select the trigger signal you want to export (e.g., Start Trigger, ai/Start Trigger, ao/Start Trigger, or Reference Trigger) 
   2. Output Terminal: Specify the target terminal where the trigger signal should be routed (e.g., /PXIe-4463/PFI0).
2. Alternatively, you can use the DAQmx Connect Terminals (VI) to explicitly route signals from one card to the other through the backplane.
   1. Note: With this method, do not forget the DAQmx Disconnect Terminals (VI) in your code to release the created paths once they are no longer needed.