I have mine plugged into an ipac-2 & it is currently connected to both coin inputs 1 & 2. As far as I know, all it does is when a coin is inserted into the coin mech, the mech sends a signal to the shefras board (which, I think only has the 12v supply to power its self & the actual coin mech) the shefras board then sends power to a soleniod (sp?) which is just a powered switch.
So once the coin is inserted, assuming the mech is set to give say 6 credits for in my case