Siemens SIRIUS 3RW55 Equipment Manual page 340

Soft starters and solid-state switching devices

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Example circuits

A.3 Special applications

Basic configuration

Safe shutdown up to SILCL 3 according to IEC 62061 / PL e according to EN ISO 13849‑1 requires

the use of 2 redundant contactors and monitoring of the auxiliary contacts of both contactors.

Two-channel monitoring of the EMERGENCY STOP is also required here.

EMERGENCY STOP

3RT20 contactors

3RW55 soft starter

3SK1 safety relay

SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters

Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006

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Sirius 3rw55 failsafe