IR to DCW to ACW is programmable MCU ... (set up as current)ACW to DCW to IR automatic switching function20 memory groups, 8 test steps ... per groupAuto shift range in IRStandard PLC interface, optional ports: RS232, RS485Optional supply voltage 110V/220V,50Hz/60Hz. ... Chinese and English operation interfaceStandard PLC interface, optional ports: RS232C,RS485,GPIB,USB,PRINTERControl eight memory groups ...