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Prerequisites for SIL 2/PL d
● Suitable higher-level controllers
– SIRIUS 3SK1: Single-channel static feedback circuit
– SIRIUS 3SK2: Two-channel dynamic feedback circuit
– MSS 3RK3: Two-channel dynamic feedback circuit
– SIMATIC: Feedback circuit monitoring in the safety program
● Forced checking procedure (test stop) once per year
Prerequisites for SIL 3/PL e
● Suitable higher-level controllers
– SIRIUS 3SK1: Single-channel static feedback circuit
– SIRIUS 3SK2: Two-channel dynamic feedback circuit
– MSS 3RK3: Two-channel dynamic feedback circuit
– SIMATIC: Feedback circuit monitoring in the safety program
● Forced checking procedure (test stop) every 3 months
Function description
SIRIUS 3SK1 safety relay
Figure 4-27
You can achieve SIL 2/PL d with a SIRIUS 3SK1 safety relay and the converter FSA ... FSG.
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Permissible for converters FSH and FSJ, not permissible for FSA ... FSG
Connection 3SK1 inside a control cabinet for FSA ... FSG
Wiring
4.2 Control interfaces
133
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