The series of products using intelligent without opening the cover set and debug technology to provide torque protection, fault diagnosis, fault alarm, limit protection and other functions, to meet the demand of high-end users. Mainly for the electric device that is used more frequently (≤600 times / hour) ,the torque range:0～90°,the use of corner and mid-small ball valve, butterfly valve or damper supporting is the most appropriate, particularly suitable for small installation space, the difficult installation place. According to the requirements of the user, it can choose professional requirements (protection IP68), single-phase 220VAC or three-phase power 380VAC supply. You can also use non-professional type IP65, when in outdoors, recommended to install rain cover), power supply is single phase 220VAC. Accept the command signal types: You can choose analog switch or dry contact signal or pulse signal.