CX5130-N031 BECKHOFF Intel Atom Embedded PC with Terminated RS485 Interface

Product Overview

The CX5130-N031 (CX5130N031) is a high-performance, fanless Embedded PC designed for DIN rail mounting, powered by a robust Intel Atom® multi-core processor with a 1.75 GHz clock frequency. This specific model features a factory-integrated RS485 interface via a 9-pin D-sub socket, pre-configured as an end point with internal termination ON.

As a middle-tier powerhouse in the CX5100 series, the CX5130-N031 is engineered for B2B industrial automation applications requiring significant computational power, such as multi-axis motion control, complex gateway functions, and high-level communication tasks. By consolidating high-speed EtherCAT I/O control with a hardware-terminated serial port, it provides a specialized solution for connecting legacy serial networks (Modbus RTU, etc.) to modern Industry 4.0 environments.

Technical Configuration (Deep Dive)

The CX5130-N031 is technically optimized for RS485 bus integrity at the physical layer. The termination on configuration means the internal 120-ohm resistor is engaged, effectively suppressing signal reflections. Configured without echo (half-duplex), it is ready for high-speed, 2-wire serial communication.

The device architecture supports the automatic recognition of both E-bus (EtherCAT) and K-bus (Bus Terminals), allowing users to switch between I/O technologies without changing the CPU. With its multi-core Intel Atom® CPU, the CX5130 provides a substantial performance boost over the CX5120 series, enabling more complex TwinCAT 3 PLC tasks and larger process images while maintaining a fanless, maintenance-free design.

Technical Specifications

Technical FAQs

When should I choose the CX5130-N031 over a non-terminated model?

The CX5130-N031 is designed for use at the physical end of an RS485 daisy chain. If your controller is the final node in a serial network, the internal 120-ohm termination is required to prevent data corruption. If the controller is in the middle of a bus, you should use a model with termination OFF.

What TwinCAT 3 platform level does this unit support?

The CX5130 typically operates at the Performance (40) platform level. This provides sufficient power for demanding PLC, HMI, and basic Motion Control applications within the TwinCAT 3 environment.

Is the RS485 port suitable for Modbus RTU?

Yes. The RS485 interface is a standard physical layer for Modbus RTU. Using the TwinCAT PLC Serial Communication library, the CX5130-N031 can act as a Modbus Master or Slave to communicate with drives, power meters, or third-party controllers.

Engineering & Installation Guide

• Network Topology Placement: Ensure this unit is positioned at either the start or the end of the RS485 run. Incorrect placement of a terminated node in the middle of a segment will cause impedance mismatch and communication errors.

• Thermal Clearances: For optimal fanless cooling, the unit must be mounted horizontally on the DIN rail. Maintain at least 30 mm of clearance above and below the cooling fins to allow for natural convection, especially when the ambient temperature approaches 60 Celsius.

• Bus Integration: The CX5130-N031 automatically detects the I/O bus type. When expanding the system, ensure the total current consumption from the E-bus/K-bus does not exceed the controller's supply limit (typically 2 A). If exceeded, a power feed terminal (EL9410 or similar) must be added.

Engineering Advantages

The CX5130-N031 offers a superior performance-to-size ratio. Its 1.75 GHz multi-core processor allows it to handle significantly higher data throughput and faster cycle times than entry-level embedded PCs. Built with high vibration and shock resistance (conforming to EN 60068-2-6/27), it is designed for continuous operation in the most demanding B2B industrial environments. The combination of pre-configured RS485 termination and automatic bus detection reduces commissioning complexity, making it a highly reliable and flexible solution for modern machine control and industrial networking.