Does anyone can explain me how I can access a digital output signal?. I am using the session - based interface for the NI USB-6211 (toolbox version 3.0, Matlab 2011b). I am creating the session and I can add the analog channel... but, I cannot add any digital channel. In fact, when I check the devices... it only appears that my card has Analog and counters... btu I dont see any digital. Does someone have the same problem?