Problem
Protective door monitoring with automatic start Category 2
according to EN 954-1 with a SIRIUS 3TK28 safety relay with
contactor relays
The most frequently used solution for plants and machines to
secure hazardous areas is mechanically isolating protective
equipment or access hatches. In this case, the function is to
monitor unauthorized entry into plant and system areas as well as
to prevent potentially hazardous machine functions if the
protective equipment - in this case protective door - is not
closed.
Solution
The protective door is monitored by a SIRIUS position switch with
positively-opening contacts using a SIRIUS 3TK28 safety relay with
contactor relays according to Category 2 in compliance with EN
954-1. If this protective door is opened, the safety relay shuts
down via its contactor relays with positively-opening contacts
according to Stop Category 0 in compliance with EN 60204-1.
german
