WATCHING SYSTEM USING RESISTER AND SWITCH

摘要

PURPOSE: A monitor system using a resistance and a switch is provided to reduce the number of control wires by controlling between a switching circuit and a main controller with one control wire. CONSTITUTION: A monitoring object control circuit is installed in a plurality of monitored devices(CY1). A switching circuit(SWC1) includes a resistance(R1) and a switch(7) with different resistance values. The switch circuit is installed corresponding to each monitoring object control circuit. A controller(C) monitors the operation of the monitored devices.