Okay, I think I get it. I would have to use the relay lights on the OI for switch lights, instead of relay lights? Where in the coding do the pins for the relay lights get mapped to relay lights (or is it in the OI's code)?
Finally, is there a way to hook up an LED display (4 digit) to the OI? We were thinking that an LED display to display the pressure in the pneumatics would be a great feature. We would like to hook something like
this up to the OI. Ignoring external power rules, could we make it work?