Basic conguration for SIL 3
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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 3RT20 contactor
⑤ Motor
⑥ Mirror contact
⑦ PROFINET (via 3RW5 PROFINET communication module)
⑧ Safety control
F‑DI Failsafe digital input
F‑RQ Failsafe signaling output (output 41, 42; output 4)
M Ground
Q1 Safety-related output
Q2 Safety-related output
Example circuits
A.4 3RW55 Failsafe soft starter
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
358 Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
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