Product Overview

The CX5130-N031-0002 (CX5130N0310002) is a high-performance Embedded PC within the Beckhoff CX5100 series, featuring an Intel Atom® multicore processor for demanding automation tasks. This specific model is equipped with a factory-configured RS485 interface via a 9-pin D-sub socket. It is specifically designed to function as a "drop point" node in a serial bus network, configured without an echo function and with termination disabled. This configuration is standard for mid-bus serial devices that do not require signal echoing, providing reliable, high-speed communication in complex industrial control architectures.

Technical Configuration

The CX5130 series balances high processing power with modular I/O flexibility. The RS485 interface provides a robust physical layer for long-distance serial communication. By setting the interface as a drop point without echo and with termination off, this module is optimized to reside in the middle of a serial daisy chain, where signal reflection management is handled by external termination at the network ends. This allows for seamless integration into serial networks involving sensors, drives, or third-party gateways while maintaining full compatibility with the TwinCAT real-time environment.

Technical Specifications

FAQs

What is the practical implication of the "drop point, without echo" configuration?

In an RS485 network, "without echo" means the hardware does not automatically transmit the data it receives back onto the line. This is ideal for half-duplex RS485 master-slave communication where the controller should only process data directed to it and not reflect it back to other devices on the bus.

Why is the termination set to "off"?

RS485 networks require termination (usually 120 Ω resistors) at both physical ends of the communication line to prevent signal reflections. Since this module is configured as a "drop point," it is intended to be placed in the middle of the bus; enabling termination here would interfere with the line's electrical characteristics.

How does this module handle I/O expansion?

The CX5130 series is modular. You can directly connect Beckhoff Bus Terminals or EtherCAT Terminals to the side of the CPU to expand its I/O capabilities without requiring additional communication gateways.

Engineering Guidelines and Best Practices

• Bus Topology: When installing the CX5130-N031-0002 in an RS485 network, ensure you use high-quality, shielded twisted-pair cabling. Maintain strict daisy-chaining (avoiding "star" or "stub" connections) to prevent signal degradation and reflections.
• Shielding: Ensure that the D-sub connector housing is properly grounded. This is vital for maintaining signal integrity over long RS485 cable runs and protecting the internal serial interface from common-mode voltage spikes.
• Thermal Considerations: The Intel Atom processor generates significant heat under heavy load. To ensure the longevity of the Embedded PC, ensure the unit has at least 50 mm of clearance above and below the device for passive convection cooling, and verify that the ambient temperature is maintained within the rated operating range.