| 摘要 |
PURPOSE:To prevent the breakage and the damage by burning of a device in an alarm detecting system by cutting off a unit power supply when a sensor is wrong connected. CONSTITUTION:A main power supply 2 is provided together with a power controller 3, a unit power supply 4, and a sensor 5 which detects the temperature abnormality of a device 6. The controller 3 receives a power application command from a host device while the power supply 2 is supplying the power to the controller 3 and the power supply 4. Thus the controller 3 gives a power application command to the power supply 4 to start the supply of power to the device 6 end the sensor 5 through the power supply 4. Then the controller 3 cuts off the power supply 4 when the abnormality of a signal line (the abnormality due to the wrong connection of the sensor 5 or the original abnormality) is detected by the sensor 5 connected to the controller 3. |
