MR-4C / MR-4D / MR-4L / MR-4P – LINE MONITORING (WIREBREAK) RELAY MODULE
The MR-4C / MR-4D / MR-4L / MR-4P Line Monitoring (Wirebreak) Relay is a supervisory module which continually monitors the status of the field wiring by monitoring the current passing through the supervised loop. Each loop has a End-Of-Line Resistor (EOLR) placed at the end of the loop. When the wire in any of the four channel breaks, the current flowing through the loop is disrupted and the module detects this as a open-circuit fault and energizes the fault relay(s).
Especially useful for systems which uses Normally Open (N/O) Pushbuttons. The MR-4x Wirebreak Detection Module is easy to interface to your existing circuit.
More than 20,000 in use worldwide!