System for a safety switch/circuit has shunting switches operating as safety switches with an auxiliary switch function and a centralized device for detecting current intensity.

摘要

A centralized device (3) for detecting current is fitted ahead of a group of shunting switches (1) and linked to a centralized processing unit (4) with connections (5) for auxiliary switches (HS1-HS5). The processing unit is designed to detect a switching signal in an auxiliary switch from a characteristic change in current intensity in a time window after a time gap.