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Entry type: FAQ Entry ID: 73135309, Entry date: 08/18/2016

SIRIUS Safety Integrated: Protective door monitoring to SIL 3 or PL e with a safety relay

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Protective doors are frequently used to fence off danger zones. These are monitored for position and, if necessary, the area from which the hazard emanates is switched off.


The position of a protective door is monitored via two safety switches. When the monitored door is opened, the safety relay triggers and opens the enabling circuits, switching off the power contactors in a safety-related manner. If the door is closed and the feedback circuit is closed, the Start button can be used to switch on again.



Content of Downloads


Wiring diagrams Wiring_Protective_door_3SK1_SIL3.zip ( 114 KB )
Project for Safety Evaluation Tool Protective_door_SIL3_3SK1_set.zip ( 19 KB )
CAx download


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Hardware platform:  Safety, SIRIUS
Software:  none
Entry contens:  Application Examples