Siemens 3RH2140-1BM40 Contactor Relay 4NO S00 220VDC Screw Terminal

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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.

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