Safety switch, especially emergency shut-off switch, for safe shut-off of hazardous device has transponder, reader unit arranged so reader unit can read transponder in first position of control element but not in second

摘要

The device (22) has a mechanically operated control element movable between a first position and at least one second position and a detector element for detecting it in at least one of these positions. The detector element contains a transponder with an individual transponder identity and a reader for reading it, whereby the transponder and the reader unit are arranged so that the reader unit can read the transponder in the first position of the control element, preferably the rest position, but not in the second.