I want to use a DAQ Card 6062E to trigger an external device. This device has an input line for triggering whose usual state is +5V, and the acquisition is triggered when the state is 0V. I would like to know if I can use eg the DIG line VI to trigger the acquisition, or if the DAQ card can be damaged if a digital line is configured as an output while connected to a device whose input has a +5V potential. Thank you.
Sorry, I misunderstood the problem. It depends on the trigger device configuration inside your instrument. Thus, the DAQ board can be damaged in some circumstances. Usually, it is a TTL standard trigger and should be safe enough.
The safer way to do that is by using the Dig Line of your DAQ board to switch a realy and that relay would switch the input trigger pin to ground. Hope this helps. Filipe Applications Engineer National Instruments