Functional safety
13.5 Application examples
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
717
STO 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)
Figure 13-4 STO application with circuit breaker
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