XM4203.21-21-31-63-301-NN-NNNN-ILC-NNNNN

The XM4203.21-21-31-63-301-NN-NNNN-ILC-NNNNN is an embedded motion and logic controller produced by Bosch Rexroth Indramat within the XM21 IndraControl Systems series. This unit integrates CPU, memory, and communication interfaces in a compact DIN-rail form factor, allowing it to coordinate multiple drives, I/O stations, and HMI devices in industrial automation cells.

The controller operates from a nominal back-plane supply of 24 V DC, so power can be derived directly from standard control-cabinet supplies. Its computing core is an Intel Core i3 2.30 GHz processor, providing deterministic execution of PLC tasks and motion algorithms. Working data are held in 2 GB of DDR3 RAM, while firmware and user programs reside in a non-volatile flash capacity of 4 GB. For engineering access the front panel carries a single 1 × 1 Gbit (RJ45) port that supports high-speed download, diagnostics, and OPC communication without using the machine network. Protection category III isolates the internal circuitry from the mains, and a Class III supply concept matches SELV installations.

Persistent process values are stored in 4 MB of battery-free remanent memory, allowing the controller to retain counters and recipes through power cycles. The housing carries one SD card slot for program backups and firmware images, plus two USB connections—one host and one device—for field log retrieval or service laptop linkage. A metal enclosure with IP20 ingress protection is sized at 200 mm in width, 126.3 mm in height, and 74.1 mm in depth, fitting standard 35 mm rails without requiring extra clearance for ventilation. The assembled electronics weigh 1.49 kg, which eases panel-mounted installations where mass must be minimized. Operation is permitted up to 3000 m above sea level; this altitude limit defines the maximum site elevation before de-rating of loads or additional cooling is necessary.