Siemens AG 6ES7 972-0AA01-0XA0 RS485 Repeater

Siemens AG 6ES7 972-0AA01-0XA0 RS485 Repeater is a signal-regeneration device for PROFIBUS/MPI networks that extends RS-485 segments by re-driving the bus between segments. It supports up to 31 nodes per segment and baud rates up to 12 Mbit/s, enabling reliable communication across distant devices in a single PROFIBUS/MPI installation. The standard RS485 repeater (0AA01-0XA0) occupies one bus node, operates from a 24 V DC supply, and features an IP20 enclosure for indoor industrial mounting, making it suitable for control panels and DIN-rail installations. Intended to bridge PROFIBUS/MPI segments rather than diagnose network conditions, this model is used in automation cells, machine lines, and factory floors where network reach or node count must be extended; Siemens also offers a diagnostic variant 6ES7 972-0AB01-0XA0 for different installation needs.