I have an old ADT system and the key pad is hardwired. I would like to unplug the keypad and just connect the new Qolsys system I bought, but I am not sure that’s possible. When I unscrew the old keypad there are 4 wires “DATA”, “CLK”, “V-“, and “V+” with their respective colors: white, green, black, red. But there are only two wires to the Qolsys system labeled “DCIN-” and “DCIN+”. Also when I took the wires out of the ADT system, the siren started to make a noise??? And it would not stop until I reconnected the wires back to the system. I did not try to connect the Qolsys system yet because I wasn’t sure.
Any help at all would be appreciated.