This product is a control module developed to match DZW series cast iron models or other integral electric actuators, with the main feature of easy installation of AC contactors. External LCD display screen and knob board for on-site control. The W3 series modules are divided into three categories: digital, non-invasive, and intelligent. The power supply can be single-phase AC220V or three-phase AC380V, with the three-phase module capable of automatic commutation and phase loss protection. The valve position is collected as a potentiometer or absolute value encoder, which receives remote control switch signals or analog adjustment signals, and controls the AC contactor to drive the electric actuator switch action. The digital type is a mechanical limit, and debugging requires opening the cover for debugging. It outputs two relays to indicate remote position and comprehensive faults. The non-invasive type is an electronic limit, which enables non-invasive cover free debugging and operation. It outputs one analog valve position feedback signal and four relay signals, indicating feedback signals such as fully closed, fully open, remote, and comprehensive faults. The intelligent model adopts a full Chinese character menu, with complete functions such as parameter configuration, signal query, fault diagnosis and protection, data recording, etc. Output 6 configurable relay dry contacts.