Emergency stop shutdown to SIL 3 or PL e with a 3SK2 safety relay
Two-channel emergency stop shutdown of a motor by a 3SK1 safety relay and power contactors.
The safety relay monitors the emergency stop command device on two channels. When the emergency stop command device is actuated, the safety relay opens the enabling circuits and switches the power contactors off in a safety-related way. If the emergency stop command device is unlatched and the feedback circuit is closed, the Start button can be used to switch on again.