Protective device for triggering emergency stop during approach of to-be-protected object to danger point of machine or system, has control unit that triggers emergency stop based on control command for stopping machine or system

摘要

The device comprises radio frequency identification (RFID) transponders (12a,12b) for detecting protection field (8) and a separate transponder system (20) that is installed in the protective field, for detecting the protective field. An evaluation unit (16) outputs a machine control switching signal such as control command for stopping the machine (4) or system. A control unit (18) triggers the emergency stop based on the output.