XM2100.01-01-31-31-301-NN-101NNNN by Bosch Rexroth Indramat

The XM2100.01-01-31-31-301-NN-101NNNN is an automation controller produced by Bosch Rexroth Indramat for the XM21 IndraControl Systems series. It serves as the central processing unit in decentralized machine cells, coordinating motion, logic, and safety tasks over real-time fieldbuses. By combining a compact form factor with modular communication slots, the unit lets OEMs embed PLC functionality directly inside control cabinets while keeping wiring short and deterministic.

An Intel E620 running at 600 MHz supplies the arithmetic bandwidth for IEC 61131-3 programs, and the onboard 512 MB of RAM stores dynamic variables during every control cycle. Application code resides in 1 GB of flash-based read-only memory, protecting stored data from power interruptions, while retained process data is buffered inside 128 kB of battery-independent remanent memory. The logic kernel exchanges motion setpoints with drives through SERCOS III; its minimum closed-loop interval is 250 µs, so velocity and position errors are corrected four thousand times per second. A regulated backplane accepts a control voltage of 24 V DC, eliminating the need for step-down converters in the panel.

The controller links higher-level SCADA networks through a 1 Gbit RJ45 Ethernet interface, allowing diagnostics and recipe downloads without additional gateways. Electrical safety is addressed by the housing's IP20 ingress rating and its assignment to Protection Class III, meaning only the SELV or PELV supply is required. Persistent machine counters can be written to the previously unused remanent space without consuming RAM, complementing the controller's real-time resources. For local service access, the front panel offers one USB device socket and one USB host connector for application transfer, diagnostics, and temporary peripheral connection.