CX5120-0112 Beckhoff
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The Beckhoff CX5120-0112 is part of the CX Embedded PC Systems series and uses an Intel Atom E3815 processor running at 1.46 GHz with a single CPU core. It features 2 GB DDR3-RAM main memory, a DVI-I output supporting up to 1920 x 1200 pixels, and 4 USB 2.0 type A ports. The unit operates on 24 V DC power and includes two RJ45 LAN ports and an integrated UPS with 1 second hold time.
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Product Description:
The CX5120-0112 is an embedded PC produced by Beckhoff for the CX Embedded PC Systems series. Mounted on a DIN rail beside I/O terminals, it serves as the central controller that executes TwinCAT 2 NC PTP Runtime for sequence logic, axis positioning, and HMI services in industrial automation cells. By combining a processor, memory, fieldbus ports, and a small uninterruptible power supply buffer inside a 122 × 100 × 92 mm housing, the unit replaces separate PLC and visualization hardware in compact machines.
Processing is performed by an Intel Atom E3815 running at 1.46 GHz. The architecture has 1 CPU core, which simplifies deterministic scheduling. Program code and real-time data reside in 2 GB DDR3 RAM, providing capacity for motion libraries, protocol stacks, and user interfaces without swapping. The DVI-I output drives external panels at up to 1920 × 1200 px, while an integrated graphics block clocked at 400 MHz renders basic two-dimensional visualizations generated by the runtime. Typical cabinet heat gain is limited because the electronics draw only 11 W under full load, which helps support passive cabinet ventilation.
Electrical integration requires a 24 V DC supply rail. A one-second internal UPS bridges brief power interruptions so control tasks can shut down in an orderly manner. Two Gigabit Ethernet ports support EtherCAT or standard TCP/IP networks, providing connections for control traffic and communication with other industrial devices. Four USB interfaces are available through 4 × USB 2.0 connectors for service tools or removable storage. The housing carries an IP20 rating, providing protection against accidental finger contact while requiring an enclosure to guard the controller against dust and liquids. Power consumption can rise to 18 W while the UPS capacitor charges, so the cabinet power supply and thermal layout should account for this temporary operating condition. The compact housing and modest power requirements allow installation in densely populated control cabinets without active cooling.
