Patent ID: 7944672

Claim:
A control device comprising: a voltage detection unit including a low voltage input detection comparator connected to a voltage input source for detecting DC voltage input therefrom, the low voltage input detection comparator being further connected to a first low-power switch to determine whether to switch on the first low-power switch or not, the first low-power switch being connected to a relay to control whether to switch on the relay or not so as to control whether to power on or off a motor of an actuator, the voltage detection unit further including a high voltage input detection comparator connected to the voltage input source for detecting the DC voltage input therefrom, the high voltage input detection comparator being further connected to a second low-power switch to determine whether to switch on the second low-power switch or not, the second low-power switch being connected to the first low-power switch to control whether to switch on the first low-power switch or not so as to control whether to switch on the relay or not; and a limit switch control unit including a lower limit switch connected to a first optical coupler for controlling the same, the first optical coupler being connected to the first low-power switch to control whether to switch on the first low-power switch or not, the limit switch control unit further including an upper limit switch connected to a second optical coupler for controlling the same, the second optical coupler being connected to the first low-power switch to control whether to switch on the first low-power switch or not.