... ~2.2KW inverter VVVF control, constant,vairable torque mode VD4 series single phase, 220V AC 1.5~2.2KW inverterVD4-21P5Suitable ... ,4~20mA,0~10V can be selected.digital output channelProgrammable open-collector output,1 channel; relay output signal ,1 channelDigital panelLED ... cable of digital panel; brake resistor. frequency inverter Xinje VD4 series frequency inverter