| 摘要 |
PROBLEM TO BE SOLVED: To prevent circuit-break of a relay from occurring due to a falling of the voltage applied to a relay coil to below the open-circuit voltage when causing a power source voltage drop at the time of a power-on of driving power source of another actuator or an instantaneous power failure. SOLUTION: In the electronic control device, when supplying a driving voltage with an actuator driving circuit 15 in a state that the voltage applied to both the ends of a coil of alternating current relay is equal to or higher than the open-circuit voltage and lower than the operation voltage, a control device 3 outputs a relay driving signal 5 the prescribed time period before the control device 3 outputs an actuator driving circuit power source energizing signal 11. COPYRIGHT: (C)2011,JPO&INPIT
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