Power line control from safe environment of machinery located in dangerous environment

摘要

Problem to be solved: to provide safe electrical control and communication between a remote control unit located in a safe place and an interface system for a machine located in a dangerous place.The control and communication provided via industrial voltage power line 20 across barrier 24 isolating the safety position from the hazardous position is such that the control and communication signals are superimposed on the alternating current operating power supplied to machine Provided by reactive coupling to an industrial power line 20 across isolation barrier 24.The interface system located in the hazardous place and each of the remote control modules located at a safe location provide such reactive coupling to the industrial voltage power line to communicate therewith.Diagram