| 摘要 |
PURPOSE:To continue a control function and transmit an error signal to a control unit after a failure in a signal system power supply by converting another voltage power supply to a signal-based power supply. CONSTITUTION:If a signal-based output voltage +5V becomes faulty by some reason and output cannot be made from a voltage output terminal 5 to controller, a load-based output voltage +12V is converted by a voltage conversion circuit 3 in advance and stepped down to a power supply of +5V, which is supplied to the controller. And an error signal E informing the fault of the signal-based output voltage is transmitted to the controller through an error signal output terminal 6. By doing this, the controller continues the normal operation and the fault of the signal-based output voltage is instructed. |
