CX5120-0123 Beckhoff
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The Beckhoff CX5120-0123 is part of the CX Embedded PC Systems series and is powered by an Intel Atom E3815 processor running at 1.46 GHz with a single core. It has 2 GB DDR3-RAM main memory, 256 MB graphics memory, and features 4 USB 2.0 ports along with 2 RJ45 LAN ports supporting speeds up to 1000 Mbit/s. The PC operates on a 24 V DC power supply and has dimensions of 122 x 100 x 92 mm.
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Product Description:
The CX5120-0123 embedded PC controller is manufactured by Beckhoff as part of the CX Embedded PC Systems series. This compact DIN-rail unit acts as the central PLC and motion platform for automated machinery, running the TwinCAT 2 NC I Runtime to process PLC logic and interpolated axis control. An Intel Atom E3815 processor with a single core handles program execution, allowing deterministic task scheduling at the machine level. The design suits decentralized cabinets where integrated control, communication, and visualization are required.
The computing section operates at a clock speed of 1.46 GHz, supported by 2 GB of DDR3 RAM for real-time variables and operating system components. Integrated graphics allocate 256 MB for HMI rendering without requiring an external card. Two Gigabit Ethernet controllers use two RJ45 sockets, each supporting link negotiation at up to 10/100/1000 Mbit/s for EtherCAT or standard TCP/IP traffic. Four USB 2.0 interfaces provide peripheral expansion, and each port can supply 500 mA to power barcode scanners, storage devices, or touch displays. A one-second UPS buffer bridges short power interruptions so the file system can close properly before shutdown.
The controller draws 11 W during typical operation and allows a maximum consumption of 18 W when the internal UPS charging circuit is active. Supply power enters through a 24 V DC terminal that also energizes the attached I/O slices. The aluminum housing measures 122 × 100 × 92 mm, giving the unit a compact footprint for control cabinet installation. Natural convection removes heat from the housing without a cooling fan. The passive cooling arrangement eliminates fan maintenance, while the single-board layout minimizes wiring between the processor, memory, and I/O buses. Its DIN-rail mounting format allows the controller to be positioned alongside compatible power terminals and automation modules.
