Hi all!
I have a NPN sinking sensor (3 wires) that I want to connect to my NI9421, however I am lost.
Basically I have connected the power source to my sensor, and connected the sensor ground to my power source ground. Then I connected the sensor output wire to the NI9421's digital input pin, and the COM pin of the NI9421 to my power source ground. I am not getting any signal.
What am I doing wrong here?
Many thanks!