The ICT PRT-CTRL-DIN Protege GX DIN Rail System Controller is the central processing unit for security, access control, and building automation within a Protege GX system. The controller communicates with all connected modules, stores configuration and transaction data, processes system communications, and reports alarms and system activity. It includes support for two doors, eight monitored inputs, two Form C relay outputs, one monitored bell output, Ethernet connectivity, encrypted RS-485 communications, and DIN rail mounting.