The System 2005 Controllers series is a modular PLC platform built around a combined system and I/O bus, with control hardware organized through backplanes, power supplies, CPUs, programmable interface processors, bus controllers, memory modules, and local or remote I/O modules.
The series supports local bus expansion, remote I/O architectures, mixed-system configurations with B&R 2010 hardware, and network communication through interfaces such as RS232, CAN, RS485, PROFIBUS, Ethernet, USB, and PCMCIA depending on the controller or interface module used. Its controller range includes slot-based CPUs as well as CPU inserts for power supply modules, and certain modules can also operate as intelligent interface processors that offload communication or collect field data for another CPU. Program and system data are stored in buffered SRAM and FlashPROM, with real-time clock support, battery-backed retention, status LEDs, reset controls, operating-mode elements, and programmable system flash features included across key controller modules. Overall, the System 2005 Controllers series is intended for modular industrial automation applications that need flexible controller selection, expandable I/O structure, and multiple communication options within a rack-based PLC system.