... variable torque mode, flexible I/O, field bus VD4 series single phase, 220V AC 0.75KW frequency invertersVD4-20P7Suitable motor:0. ... , External Dimension: 50*190*144 (Note: VD4-20P7-A has OC output, current display and brake, improve the ... with master-slave multi-devices linkage functionRunning functionCommand modeOperated by three mode: digital panel, control terminal, serial portFrequency setting ...