Siemens 6ES7 972-0AA00-0AB0 USB To PPI Interface Cable

The Siemens USB/PPI MM MULTIMASTER cable, order number 6ES7901-3DB30-0XA0, is a USB-to-PPI interface designed for SIMATIC S7-200 PLCs. It links a PC’s USB port to the S7-200’s PPI port for programming and data communication, and is labeled MM MULTIMASTER to denote multi‑device compatibility, though the cable does not support Freeport networking. The cable length is 5.6 meters, providing flexibility in bench or lab setups. Its purpose is to connect a USB-equipped PC to an S7-200 CPU/EM277 communication port to perform configuration and data exchange using the PPI protocol, supporting common S7-200 development workflows.