Product Description:

The CX2500-0030 expansion module is produced by Beckhoff for the CX Embedded PC Systems series. It provides additional serial communication capability to a CX CPU and is intended for machine-level control where legacy field devices must be integrated into modern PLC architectures. By adding a dedicated interface unit instead of a full controller, system designers can scale I/O capacity without altering core processing hardware, maintaining deterministic data exchange inside an industrial automation environment.

Each channel on the module conforms to the RS232 electrical standard, letting the controller communicate with printers, barcode scanners, or older drives that expect single-ended signaling. The maximum transmission speed is 128 kbit per second, so polling sequences and diagnostic messages remain within the timing limits of typical serial peripherals. The unit offers 2 independent ports on a front-panel D-Sub plug connector with 9 contacts, and the pinout follows the standard PC assignment for straightforward cabling. Power is supplied through the system bus, so no separate feed is required. The housing is rated IP20, which provides basic finger protection when the module is mounted on the DIN rail beside other CX components.

The thermal envelope of the extension is limited to a peak loss of 2 W, so neighboring modules in a compact cabinet do not experience significant temperature rise. Physical dimensions are kept minimal: the depth is 54.5 mm, the height is 99 mm, and the module occupies only 24 mm of horizontal rail space. These measurements allow the CX2500 segment to fit inside shallow control panels and still clear door obstacles. Low mass and short edge-to-edge runs improve vibration tolerance, and the passive aluminum housing directs waste heat into ambient air without fans or auxiliary cooling hardware.