Siemens Control Relays

Siemens Sirius safety control relays are required to have positively driven contact elements according to IEC 60947-5-1 Annex L. Positively driven contact elements are a combination of NO auxiliary contacts and NC auxiliary contacts whose construction prevents them from being closed simultaneously. In some industries, such as automotive, requirements have beenestablished that a safety rated control relays must also have permanently mounted auxiliary contact blocks. See page 2/70 for Control Relays with permanentlymounted auxiliary contacts.

Siemens Control Relays for “Safety” applications:

All Siemens SIRIUS 3RH1 control relays (with at least 1 NC contact) meet or exceed the criteria for "Safety Control Relays” according to IEC60947-5-1 Annex L.

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