Hi, I've been trying to implement some fancy controls using the virtual switches etc in a multiplus 2 (parralleled to another multiplus). I'm trying to understand how the inputs work, do they just require a switch on the output as they have an internal supply? or do they need a 0v to 5v input? if so, what polarity? I'm trying to get ignore mains input and a load ramp for a generator. Having set up programmable relays etc to do this, at the moment when I short the aux input, nothing happens. I programmed it super simple so when input is v0 (shorted) turn on relay k1....nothing.