XM4203.21-21-31-63-301-NN-NNNN-ILC-NNNNN by Bosch Rexroth Indramat

The XM4203.21-21-31-63-301-NN-NNNN-ILC-NNNNN is a programmable logic and motion controller produced by Bosch Rexroth Indramat within the XM21 IndraControl Systems series. This modular unit consolidates CPU, communication, and I/O coordination so that machine builders can run PLC sequences, interpolation routines, and diagnostic tasks from a single DIN-rail device. By integrating directly into EtherCAT or Sercos networks, it acts as the central command element for drives, sensors, and safety modules in automated assembly lines and packaging machinery.

The controller accepts a 24 V DC supply and converts it internally to the regulated rails that feed its Intel Core i3 2.30 GHz CPU and backplane. Computing resources include 2 GB of DDR3 RAM for IEC 61131-3 tasks. A front-mounted Engineering Ethernet port rated at 1 × 1 Gbit (RJ45) provides setup access, while separate USB host and device connectors support software loading and HMI interfacing. One SD card slot supports removable log storage, augmenting the 4 MB of remanent memory reserved for retentive variables. The housing measures 74.1 mm in depth and 200 mm in width; together with a 126.3 mm height it fits into shallow control enclosures. For cabinet integration it carries an IP20 ingress rating and belongs to Protection Class III for extra-low-voltage circuits.

At just 1.49 kg, the unit minimizes rail loading and remains easy to handle during DIN-rail installation. Internal boards tolerate installation sites up to 3000 m above sea level, so the controller can serve high-altitude conveyor or hydroelectric equipment without derating. Program code and operating data reside in 4 GB of non-volatile flash, enabling rapid boot after power cycling and leaving space for additional software modules such as kinematic libraries or condition-monitoring functions.