Siemens SINAMICS Series Operating Instructions Manual page 721

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SS1 application with circuit breaker

First channel (blue): Circuit breaker (3WL) armature + armature auxiliary contactor

Second channel (red): Firing pulse circuit, SAFETY circuit

Safety components (green)

Contact blocks for field excitation (gray): Line contactor field + field auxiliary contactor (also as the field contactor is

usually controlled as well)

SS1 application with circuit breaker

SINAMICS DCM DC Converter

Operating Instructions, 12/2018, A5E34763375A

Functional safety

13.5 Application examples