I have a open collector to a relay and am using a 12v power supply. The first time the open collector opened the relay fired and I got a signal from my contact closure. Now the relay wont disengage and I am getting a 12V shock on either side of my contact closure wires. What have I done? I wired the coil on the relay to + on the power supply and + on the open collector side, then tied the - on the power supply to the - on the open collector. Did I do that correctly?