AMETEK 2003RP - Manual (Page 43)

4.6 Remote Inhibit [Option]
A Remote Inhibit BNC input is located on the rear panel of the 2003RP if the -OP1 option
was specified at the time of purchase. This input may be used to disable the AC source
output using an external control signal.
Default mode of operation
If the Remote Inhibit (RI) input is left unconnected, the output of the AC source can be turned
on using the OUTPUT button on the front panel or the appropriate bus command. To disable
the output relay, a logic low level or a contact closure needs to be present across the
terminals of the RI BNC connector.
Typical use of the RI input is in rack systems where the RI input is wired to a switch that
detects removal of the rear panel. This input may also be used to simultaneously shut down
multiple AC power sources.
Note that the RI input has an internal pull-up resistor to TTL logic high. When the RI input
cable is disconnected, the output will recover and the output relay will be closed
automatically.