... 3. High-end Chinese brand; 4. ISO9000 5. CE EM303A Frequency inverter1-phase 220V+/-20%, 0.4 - 4kW3-phase 220V +/- ... CNC, extruder, pump,Technical specifications:Control mode: OLV, V/F, Frequency width: 0.01-600.00HzDigital channels: 7 inputs, 2 outputs ... NO / NC selectable)LED keypad for standard inverterSupport ModBus RS485Auto voltage regulation ( AVR)Built-in braking chopper for standard inverter 0 ...