Emergency Stop Shutdown To Sil 3 Or Pl E With A 3Sk1 Safety Relay - Siemens SIRIUS 3RW52 Manual

A.3.3

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

The 3RW52 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 / 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
Requirements
● If the soft stop function is set (ramp-down time setting element set to > 0 s) and the
emergency stop circuit is tripped, a "Missing load voltage, phase failure / missing load"
fault may be indicated on the soft starter. In this case, the soft starter must be reset
according to the selected RESET MODE.
SIRIUS 3RW52 Soft Starter
Manual, 01/2019, A5E35630451002A/RS-AD/004
Emergency stop
3RT20 contactors
3RW52 soft starter
Motor
3SK1 safety relay
Example circuits
A.3 Special applications
183