Finder 9980 series indicator emc suppression modules finder 9980023098 this finder 9980 series module features an led and an emc suppression circuit the varistor emc suppression circuit protects against negative going voltage spikes damaging relay drivers the led indicates that the associated relays coil is energized compatible sockets are available that allow a relay and emc module to be used together finder 9980023098 coil indication and emc suppression module 110 240vacdc