Looking for some help on creating a circuit to be able to monitor 4 power supplies (could be any combination of +12V, -12V, +24V, -24V power supplies that all share a common ground) and provide a single relay contact closure in the event that any one of those power supplies turns off.. I know I can do it with 5 or so relays and some diodes but hoping to get a better (read..slightly lower cost transistor or similar) solution
I started going down this road and found out it only works for specific situations.. All neg polarity if supply ground leg is disconnected or all pos polarity if other leg is disconnected..
Just looking for other suggestions..
I started going down this road and found out it only works for specific situations.. All neg polarity if supply ground leg is disconnected or all pos polarity if other leg is disconnected..
Just looking for other suggestions..