SUPERVISORY CONTROLLER FOR MOTOR DRIVE SWITCH

摘要

PURPOSE:To inform a switch device main body to be opened due to external cause without mistake by providing a state detection means detecting the closing state of the switch device main body and outputting a fault signal when the state detecting means does not consecutively detect the closing state. CONSTITUTION:A fault detecting means 38 detects that the device main body 11 is in the closed state and the state detecting means 35 is in the closing state, a stop contact 27 is opened when a voltage at a state detection input terminal 23a of a microcomputer 23 is at logical 11 and the device main body 11 is disconnected from a commercial power supply 14. In this state, if the state detection means 35 does not detect consecutively the closing state for a proscribed time regardless of the open drive of the device main body 11 by a supervisory controller 18, the fault detection means 38 brings the voltage at a fault output terminal 38a to 11 level to give a fault output. Thus, a fault display lamp 40 is lighted and the shutter opened intentionally can be informed to personnel in a house.