| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a board for a working machine, easy to avoid the occurrence of the error between the detection value by an analogue sensor and the detection point by a controller, and also capable of avoiding the systemdown of the controller even if a short circuit occurs on the sensor side. Ž<P>SOLUTION: The board for a working machine includes: a power source circuit 44 supplying power from a power source 42 supplying power to a controller 41 to the analogue sensor 32; a detection circuit 46 making the controller 41 detect an output voltage drop greater than a set voltage in the power source circuit 44; and a changeover circuit 48 switching the power source circuit 44 between a power supply mode and a power shutdown mode. In the board, the controller 41, when a voltage drop greater than the set voltage occurs in the power source circuit 44, operates the changeover circuit 48 based on the detection result from the detection circuit 46 to switch the power circuit 44 to the power shutdown mode. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
