auxiliary switch, on the front, 2 NO + 2 NC, 53/54, 61/62, 71/72, 83/84, current
path: 1 NO, 1 NC, 1 NC, 1 NO, spring-loaded terminal, physically coded, only with
contactor relays 3RH2140 and 3RH2440 combinable (according to EN 50011)
auxiliary switch, on the front, 3 NO + 1 NC, 53/54, 61/62, 73/74, 83/84, current
path: 1 NO, 1 NC, 1 NO, 1 NO, screw terminal, for contactors 3RT2 and contactor
relays 3RH2