The Siemens SIMATIC S7-300 IM360 interface module, model 6ES7360-3AA01-0AA0, is the master interface for Rack 0 in a multi-rack SIMATIC S7-300 system. It routes the S7-300 backplane bus to the next rack and enables connections to up to three expansion racks via the C-bus, defining the central link for scalable, multi-rack configurations. Designed for central rack operation, the IM360 acts as the master in the backplane network, coordinating communications between the primary rack and expansion modules to extend the system while preserving a unified control architecture.
