| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric actuator that is allowed to shift to a maintenance mode while in an energized state.SOLUTION: A latching relay contact 31 is provided in a power supply passage from a storage capacitor 30 to a motor 25. The latching relay contact 31 is opened when a set coil 32 of a latching relay is energized and biased, and the latching relay contact 31 is closed when a reset coil 33 of the latching relay is energized and biased. A delay circuit 36 and a contact control circuit 37 are provided, and after predetermined delay time T has elapsed since a power switch 22 is turned on, a contact 38 is turned off so as to release the reset coil 33 from the energized and biased state. With the power switch 22 turned on, thus, an automatic contact return switch 35 is turned on, the set coil 32 is activated, and the latching relay contact 31 is turned on, so as to shift an electric actuator to a maintenance mode. |
