The
Integrity Instruments RCE-1 allows the user to monitor
contact status at one location, and send these signals to a
remote location. There are two units supplied, a master unit
and a slave unit. The system is bi-directional allowing
contact status at the remote location to be sent back to the
other end. Up to 8 inputs at each end can be sent as outputs
to the other end. The uniqueness is that this is done over a
single twisted pair of wires.