Design of essence safety communication in monitoring system

Abstract：According to the newly promulgated 2001 edition of Safety Rules of Coal Mine and the General Technological Requirements Against Explosion Electrical Equipment in an Environment with Explosive Gas in the newly promulgated GB.3836.4, the authors designed the communication in KJ93 monitoring system.This paper presents the RS-485 communication mode with light and electricity, which are separated when designed it.It also presents the design of essence safety power source for this communication mode.

Keyword：electricity are separated;essence safety power source;