Emergency Stop Shutdown To Sil 3 Or Pl E With A 3Sk1 Safety Relay - Siemens SIRIUS 3RW50 Manual

A.3.4

EMERGENCY STOP shutdown to SIL 3 or PL e with a 3SK1 safety relay

The 3RW50 soft starter has no effect or influence on the safety function of the application.
For this reason, it is neither positively nor negatively considered in the safety application, and
also does not have to be included in the calculation for proof according to the standards.
Safe shutdown up to SILCL 3 according to IEC 62061:2005 and PL e according to
EN ISO 13849-1:2015 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.
Basic configuration
①
②
③
④
⑤
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001
Emergency stop
3RT20 contactors
3RW50 soft starter
Motor
3SK1 safety relay
Example circuits
A.3 Special applications
223