Access Control REX-DPS 1k resistor X 2 Supervision
@RAMJr
8 years ago
https://everycircuit.com/circuit/5943781447958528
Top example is a N.O. (ie. REX-RTE) 4 way supervised circuit.
Bottom example is a N.C. (ie. DPS) 4 Way supervised circuit.
These circuits will monitor for: Broken wire, bad switch, short circuit and damaged wire.