My Scantronics alarm has a bellbox output that is 12v when the alarm is set or unset and the 12v is removed when the alarm is triggered. This is opposite of what a simple 110db 12v siren needs. So when auxilary security devices are wired to an alarm which require 12v when the alarm is triggered, how are people wiring these up?
I've currently got them wired via a transistor/relay setup but wondering if there's a simpler way.
I've currently got them wired via a transistor/relay setup but wondering if there's a simpler way.