Safety switches and solenoid interlocks can be mounted inside or outside the hazardous area. No additional handles or levers are required on the safety guard. The door handle is latching.

Hazardous areas of machines and plants can be so large, that the machine can be entered completely by personnel.

The Machinery Directive requires that in this case personnel cannot be inadvertently locked into the hazardous area.

To prevent this situation, the Schmersal solenoid interlocks can be fitted with an emergency exit system. This allows personnel to evacuate the hazardous area easily. By opening the emergency release, the safety circuit of the machine is interrupted and the machine is shut down.

However, in order not to endanger personnel that could be inside the hazardous area during the machine start-up or restart, a few aspects have to be taken into account.