Solution
Unfortunately, you can't send a trigger signal using the DAQ Assistant because the DAQ Assistant does not support sending trigger function. If you want to generate a trigger signal, you should use the
DAQmx Export Signal(VI). DAQmx Export Signal (VI) is supporting the function routing a control signal to the terminal you specify. The output terminal can reside on the device that generates the control signal or on a different device. As this function, you can share the clock and trigger among multiple tasks and device.