CX2072-N031-0004 BECKHOFF Embedded PC Basic CPU Module

Product Overview

The CX2072-N031-0004 (CX2072N0310004) represents the pinnacle of compact, high-performance computing within the BECKHOFF Embedded PC family. Powered by an Intel Xeon multi-core processor, this Basic CPU module is designed for extreme computational tasks, including high-axis-count motion control, complex machine learning algorithms, and large-scale vision applications. This specific variant is factory-fitted with an RS422 interface, enabling robust, long-distance serial communication in electrically hostile environments. Ideal for power plant management, aerospace test benches, and semiconductor manufacturing, the CX2072-N031-0004 ensures deterministic control and high data throughput while maintaining a fanless, ruggedized form factor.

High-Speed Serial Communication Architecture

The N031-0004 hardware option provides a dedicated RS422 interface via a standard 9-pin D-sub socket. Engineered for point-to-point reliability, this module is pre-configured as a full duplex end point with internal termination on. This "termination on" status is critical for high-speed data transmission, as it matches the characteristic impedance of the communication line, effectively eliminating signal reflections and data corruption over long cable runs. By offloading serial protocol management to this dedicated hardware layer, the Intel Xeon CPU remains free to execute core PLC and NC tasks without interrupt-driven latency.

Technical Specifications

Engineering FAQ & System Diagnostics

What are the advantages of the "Termination On" configuration?

In RS422 networks, termination is required at both ends of the cable to prevent signal bounce. Since the CX2072-N031-0004 comes with termination enabled, it is specifically designed to be located at the physical end of a communication segment. This simplifies installation by removing the need for external resistor bridges on the D-sub connector.

Can the RS422 interface be reconfigured to RS485 via software?

No. While RS422 and RS485 share similar physical characteristics, the N031-0004 is hardware-optimized for the RS422 full-duplex standard. For RS485 multi-drop applications, a different "N" suffix module (such as N031-0002) should be selected to ensure correct transceiver logic.

How does the CX2072 handle high-vibration environments?

The CPU module features a solid-state design with no moving parts. The internal storage is typically CFast or SSD, and the multi-core Xeon processor is secured via advanced thermal coupling that doubles as mechanical stabilization, meeting EN 60068-2-6 standards.

Field Installation and Commissioning Protocol

• Full Duplex Wiring Logic: Since this is a full-duplex device, ensure that the TX+ / TX- and RX+ / RX- pairs are correctly crossed when connecting to the remote peer (TX to RX, RX to TX). Using high-quality shielded twisted pair (STP) cable is mandatory to maintain the signal integrity provided by the Xeon-class architecture.

• Thermal Clearance Requirements: Given the high power density of the Intel Xeon processor, a minimum lateral clearance of 30 mm is required between the CX2072-N031-0004 and adjacent modules. Failure to provide adequate airflow can trigger thermal throttling, reducing the execution speed of the TwinCAT runtime.

• Grounding for Serial Protection: The RS422 interface is galvanically isolated. To ensure maximum protection against surge voltages, the D-sub shell must be bonded to the control cabinet's functional earth (FE) via a low-impedance connection.

Engineering Advantages

The BECKHOFF CX2072-N031-0004 bridges the gap between traditional industrial controllers and server-grade computing. Its ability to handle massive I/O throughput via the internal PCI Express backplane, combined with the reliability of a terminated RS422 link, makes it the preferred choice for "Industry 4.0" implementations. The integrated heat pipe cooling system ensures that even under 100% CPU load, the system maintains a stable operating temperature, preventing the hardware fatigue common in high-performance automation.