6ES7901-3DB30-0XA0 Siemens s7-200plc multi-master ppi programming cable with isolated usb interface, directly use the usb interface in step7microwin software, no need to install drivers, support ppi, multi-master ppi, advanced ppi protocol, support 187.5 kbps high-speed communication, with communication indicator. 6ES7901-3DB30-0XA0 is an intelligent multi-master PPI programming cable (PPI Multi-Master Cable) with USB interface, which realizes level conversion from USB to RS485 and various PPI protocol conversion. At present, many cheap USB/PPI on the market communicate by converting USB into virtual serial port (COM port), commonly known as “pseudo USB interface”. This kind of cable is only a level conversion from USB to RS485 and can only support ordinary PPI protocol. . And USB/PPIM+ is a real USB interface cable, no need to install driver, directly use the USB option in STEP7 Micre/WIN software, support PPI, advanced PPI (Advanced PPI), multi-master PPI (Multiple Master Network)