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* If there is a common reference potential for the two inputs, it su󹪟ces to establish a ground connec‐
tion.
If there are separate potentials or controls, both connections must be assigned.
Circuit diagrams
14.4 Typical circuits of 3SK1 safety relays with 3RM1 Failsafe motor starters
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 223