The switching module ER is suited for safety switches with positive actuation. This is only valid for one or several normally open contacts. Further precondition is the actuation over a sufficiently long distance, to result in a contact opening of minimal 2 x 2 mm results. The switching module is also used as auxiliary switch and is thus applied at door interlocks, key switches, limit switches etc. The plunger is equipped with a roller and can therefore be actuated by a ramped device.