1V/F control, vector control and output torsion control. 2Built-in RS-485 communication interface. 3With aspeed potentiometer and external panel. 4Builtin synchronous control and proportional synchronization control. 56 speed control modes, Can run automatically. Features:V/F control, vector controland output torsioncontrol.Built-in RS-485 communication interface.With aspeed potentiometer and external panel.Built-in synchronous control and proportional synchronization control.6 speed control modes, Can run automatically.Can choose multiple running commands or frequency channel.Can be achieve part or all of the keys locked(Analog potentiometer unlock).Relay normally open and two high configuration output have 100 kinds of ways optional.5 digital opto-isolated inputs, 100 kinds of ways optional.1 analog input, 2analog output channel.Having textile pendulum frequency function, It can be widely applications for textileequipment.Built-in user-defined timer /counter. At zero speed, can output 0-100% of adjustable torsion, with zero speed brakefunction.Specifications: Model: SKI780 Rated Voltage (Optional): 1-phase 220V to 3-phase 220V, 3-phase 380V to 3-phase 380V Output Power (Optional): 0.75/1.5/2.2kW Control Way: Current vector Output Voltage Regulation Mode: PWM control Size: Approx. 110 x 85 x 142mm / 4.3 x 3.3 x 5.6in Weight: Approx. 1000-1042g / 35.3-36.7oz Package List: 1 x Frequency Converte Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.