Siemens 3RH2131-2BB40 Contactor Relay 3NO 1NC S00 24VDC Spring Loaded

The 3RH21 contactor relays (with the exception of the coupling contactor relays) can be expanded by up to four contacts by the addition of snap-on auxiliary switch blocks.

The auxiliary switch block can easily be snapped onto the front of the contactor relays. The auxiliary switch block has a centrally positioned release lever for disassembly.

The conventional front auxiliary contacts fulfil the characteristics of positively driven operation and are therefore suitable for safety applications.