Problem with input port (all)

edelec

You do not say which version controller V1.1 or V2.1. The first has positive switching the second negative switching and I feel you are not wiring correctly. If you have V1.1 a normally open switch should be connected between 12v and the input.  If you have V2.1 a normally open switch should be connected between GND and the input.
Please come back if this does not help.

edelec

You are switching 12v in that the action of your switch closing allows current to flow from 12v through an opto-coupler through your switch to GND. Take a look at page 22 Fig 2-17.