1、EXCELLENT HEAT DISSIPATION: Using 24V DC cooling fan, external aluminum heat dissipation base, possess efficient heat dissipation 2、2 LAYER BOARD: Simplified layout with double layer board design, PCB board is treated with three proof paint, possess simple structure and low failure rate 3、HIGHLIGHT DIGITAL TUBE DISPLAY: Variable frequency drive using humanized operation, highlight red digital tube display, avoid misoperation 4、FIRE RESISTANT MATERIAL: Pay attention to safety, ABS fire resistant and heat resistant plastic material shell, the terminal is fully surrounded by design to avoid the danger of electric shock 5、WIDE USES: Complete control ports, can be used in various automation equipment with PLC and sensors, voltage vector control, widely used 6、WITH STABLE PID CONTROLLER: Built in PID controller, which can be applied to occasion requiring constant voltage, constant temperature, constant tension open loop control and closed loop control. Zero speed brake function can be used for truck cranes and other occasion 7、PROTECTION FUNCTIONS: Provide overvoltage, undervoltage, current limit, overcurrent, overload protection, electronic thermal relay, click overheat, overvoltage stall, data protection, low frequency warning, soft start function, protect equipment and power grid