Siemens SIRIUS 3RW55 - Page 357

Basic con󹪝guration for SIL 1
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① EMERGENCY STOP mushroom pushbutton 3SU1 for stopping operation
② Pushbutton 3SU1 for enabling the safety function
③ 3RW55 Failsafe soft starter
④ Motor
⑤ PROFINET (via 3RW5 PROFINET communication module)
⑥ Safety control
Q1 Safety-related output
F‑DI Failsafe digital input
F‑RQ Failsafe signaling output (output 41, 42; output 4)
Example circuits
A.4 3RW55 Failsafe soft starter
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006 357