Further information for Schneider Electric RZM021RB mounting module varistor+L
Harmony Relay. Protection module for mounting in the relay base. The module is connected to the coil control circuit and protects the control output circuit. Protection is ensured by a varistor in AC and DC circuits 6-24 VAC/DC. In addition, a green LED shows the control status. Primarily used with the RSB and RXG relay series.