6ES7901-3CB30-0XA0 6ES7 901 Cable RS232 to RS 485 for PC/PPI+ Siemens S7-200 PLC Support Windows 7 32bit/windows 7 64bit/vista 32bit/vista 64bit/windows 2000/Windows XP (WinNT4/95/98/Me/DOS NOT SUPPORTED) Isolated 232 interface Siemens S7-200 PPI programming cable, to ensure the real-time transmission of data, programming communication cable, PC / PPI, 232/RS485 converter with optical isolation It's a direct replacement with high qulity after market part The qulity is guaranteed, it's tested before shipment