PLC Cables, Inc - Aftermarket Siemens 6ES7972-0CB20-0XA0 PLC S7 USB to MPI ProfiBus DP PPI 32 64 bit PLC communication Cable Download/Upload,USB to Profibus/DP or USB to MPI adapter for programming Siemens 300/400 CPU's on either a DP (Profibus) or MPI network and is supported with 32 or 64 bit systems (PC's) running Windows, made by us not Siemens, this is our version of the 6ES7972-0CB20-0XA0