Feature:1. MULTI STAGE CONTROL: 8 stage programmable realize multi stage speed control, optional multiple operation modes, simple PLC operation, optional torsion or speed control mode2. ANALOG INPUT OUTPUT: Come with standard RS485 RTU mode, multiple analog input or output of 05v, 010v, 420ma, 020ma3. CONSTANT PRESSURE WATER AND WIND: Adopt PID control, constant pressure water supply, wind pressure constant pressure control, environmental protection and energy saving, low noise, low electromagnetic interference4. STEPLESS REGULATION AND ENERGY SAVING: Low frequency and high torsion energy saving, multiple motor protection methods, stepless speed regulation5. VARIOUS PROTECTION: Possess overcurrent, overvoltage and undervoltage, module failure, overheating, short circuit, input and output phase loss, abnormal adjustment of motor parameters, electronic thermal relay and other protection methodsSpecification:Item Type: Variable Frequency DriveModel: AT904-4KWInput Voltage: Single phase 220VAC 50/60HzOutput Voltage: Three phase 0-380VAC 0-400HzMaximum Output Current: 20AAdapted Motor Power: 4KW (6HP)Filter: Built in filterApplication: General purposeDC Power Supply Properties: Voltage typeControl Mode: V/F open loopOutput Voltage Regulation Mode: PWM controlAppearance: ABS plastic shellProduct Size: Approx. 25 x 18 x 16.5cm / 9.8 x 7.1 x 6.5in(manual measurement with certain error)Uses: Control the start, stop, speed regulation and CW and CCW rotation of the motor to meet the conditions required for production or equipment use, widely used in fans, pumps, air compressors, etc..Package List:1 x Variable Frequency Drive1 x User ManualNote:1. Select a compatible motor to use, you must choose a 380V three phase motor with a power less than 4KW and adjustable speed.2. According to the wiring method of the manual, connect the power supply and the three phase motor.3. Select the appropriate operation mode according to the needs of the application scenario, and refer to the manual for mode selection.4. Power on, the speed of the motor and CW and CCW rotation can be adjusted according to the knob on the panel.