CMD Contactor Monitoring Relay
Redundant connection of contactors no longer necessary
The contactor monitoring relay CMD monitors the contactor´s main contacts for
welding. In the case of welding the relay switches off the upstream circuit-breaker. Because of this circuits in safety
catergory 3 no longer need to have a second contactor that redundantly switches off.
Using the CMD, circuitry can be designed that corresponds to Performance Level d according to ISO EN 13489.
Further information about the contactor monitoring relay