Schmersal PROTECT SRB-E series multifunctional electronic safety controllers monitor most safeguarding switches, such as electromechanical switches, safety light curtains, electronic safety sensors and coded-magnet sensors. They can be adjusted to 1 of up to 11 preset configurations via a rotary dial on the front. Once changed to the desired setting, the dial is protected from further adjustment by a transparent front cover which can be secured. The controllers feature removable terminal blocks with customizable coding strips. They are suitable for applications up to Category 4, PLe in accordance with ISO 13849 and SIL 3 in accordance to IEC 61508.

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