Basic conguration
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① EMERGENCY STOP mushroom pushbutton 3SU1 for stopping operation
② Pushbutton 3SU1 for enabling the safety function
③ Selector switch 3SU1 for functional switching on and o
④ 3RW55 Failsafe soft starter
⑤ 3RT20 contactor
⑥ Motor
⑦ 3SK1 Advanced safety relay
⑧ Indicator light
ON: The device has no defect.
OFF: The 3RW55 Failsafe soft starter is not ready to start (Page 212).
DI Digital input
F‑DI Failsafe digital input
F‑RQ Failsafe signaling output (output 41, 42; output 4)
M Ground
Q1 Safety-related output 3SK1
Q2 Safety-related output 3SK1
Example circuits
A.4 3RW55 Failsafe soft starter
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006 349
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