APPARATUS FOR CHECKING CONNECTION OF AUTOMATIC FIRE EXTINGUISHER

摘要

PURPOSE: An apparatus for checking a connection of an automatic fire extinguisher motor is provided to fundamentally prevent malfunction caused by a connection failure of the motor by enabling to check a connection failure of the motor in advance. CONSTITUTION: A first power source(Vcc) is connected to a direct current motor connection check port(RA5) of a microcomputer(U1) through a pull-up resistance and at the same time the direct current motor connection check port(RA5) is applied to one end of a direct current motor(M) through backflow prevention diode(D2). A second power source(Vpp) is connected to the cathode end of the diode(D2) and to one end of the direct current motor(M) in conjunction with a relay(CSRLY) when a relay contact point is turned on. The microcomputer(U1) perceives the connection of the direct current motor(M) according to whether the first power source(Vcc) is changed and the level is changed through the connection check port(RA5) if a second power source(Vpp) is not applied, and checks the connection of the direct current motor(M) without malfunction by ignoring a change of the level through the connection check port(RA5) if the second power source(Vpp) is applied.