XM4203.21-21-31-63-301-NN-NNNN-MLCBNNNNN

The XM4203.21-21-31-63-301-NN-NNNN-MLCBNNNNN is an embedded automation controller produced by Bosch Rexroth Indramat within the XM21 IndraControl Systems series. Designed as the central processing platform for coordinated motion, logic, and communication tasks, the unit hosts real-time firmware that links field devices, drives, and supervisory software in a compact DIN-rail format. In machine and plant automation it serves as the deterministic control node that executes PLC programs, exchanges data with higher-level networks, and interfaces directly with servo drives through integrated Sercos III channels.

Its processing hardware centers on an Intel Core i3 2.30 GHz dual-threaded chip supported by 2 CPU cores, enabling cyclic task execution with deterministic response times. The controller carries 2 GB of DDR3 RAM for variable storage and buffering of program data, while an integrated eMMC array provides 4 GB of nonvolatile mass storage for firmware, libraries, and project files. Operating electronics draw power from a 24 V DC supply, and built-in monitoring flags undervoltage conditions. One gigabit Ethernet port offers standard TCP/IP communication, and two Sercos III interfaces allow soft-master control of cycle-synchronous drives. Three local extension slots accept I/O or fieldbus modules so the base unit can scale to the required axis count.

The housing measures 200 mm in width, 126.3 mm in height, and 74.1 mm in depth, forming a slim package that fits inside standard control cabinets. With a mass of 1.35 kg, the unit can be mounted on DIN rail without additional support brackets. Protection is limited to IP20, so installation inside an enclosed panel is required to avoid dust or accidental contact. A single 1 Gbit/s Ethernet connector supports engineering access, data logging, or upstream fieldbus gateways, while identical USB host and device ports simplify firmware loading or human-machine interface attachment. Process values that must persist across power cycles are stored inside 4 MB of remanent memory, ensuring machine states, counters, or recipes are immediately available after restart.