Auxiliary switch on the front, 4 NC Current path 1 NC, 1 NC, 1 NC, 1 NC for contactor relays Size S00 screw terminal 51/52, 61/62, 71/72, 81/82 Physically coded; only with contactor relays 3RH2140* and 3RH2440* can be combined (according to EN 50011)