6ES7 901-3DB30-0XA0    USB-PPI : USB interface Siemens PLC S7-200 programming cable with indicator light 
6ES7 901-3DB30-0XA0    USB-PPI+ : USB interface Siemens PLC S7-200 programming cable with indicator light, communication distance of 2 km, cable length 3 m 
6ES7 901-3CB30-0XA0    PC-PPI : RS232 interface Siemens S7-200PLC programming cable, RS232/PPI interface,  Cable length 2 m 
6ES7 901-3CB30-0XA0    PC-PPI : RS232 interface Siemens S7-200PLC Programming cable, RS232/PPI Interface,Cable length 3 m 
6ES7 972-0CB20-0XA0    USB-MPI+ : Isulated USB interface Siemens S7-300 programming adapter, with communications indicator, communication distance up to 1 km (187.5Kbps pm)5 m in length  
6ES7 972-0CA21-0XA0    PC-MPI+ : Siemens S7-300PLC programming communications adapter , optoelectronics Isolated appearance same as Siemens, with RS232 cable (5 meters) 
6ES5734-1BD20              PC-TTY : Siemens S5 PLC programming port (DB15) interface cable, length of cable :3 m 
6ES5734-1BD20                PC-TTY : Siemens S5 PLC programming port (DB15) interface cable, length of cable: 5m