HD67E51-5-A1 EtherCAT Master to Modbus RTU Master RS485 – industrial protocol converter

Industrial EtherCAT Master to Modbus RTU Master RS485 converter.

HD67E51-5-A1 is an industrial protocol converter designed to integrate EtherCAT Master systems with devices communicating using Modbus RTU Master over RS485. The device enables centralized management of Modbus RTU communication from an EtherCAT-based control system, ensuring high performance and deterministic data exchange in industrial automation applications.

The converter operates as an EtherCAT Master, controlling communication within the EtherCAT network, while simultaneously acting as a Modbus RTU Master on the RS485 serial bus. This architecture allows multiple Modbus RTU devices to be integrated into a single control system without additional intermediate controllers.

The HD67E51-5-A1 model is equipped with two RJ45 Ethernet ports featuring an internal EtherCAT switch, enabling EtherCAT input and output connection within the same network line. The Modbus RTU interface is implemented via a 3-pin 5 mm terminal block supporting RS485 communication, ensuring stable data transmission over longer distances.

Thanks to its robust industrial design and high environmental resistance, the converter operates reliably across a wide temperature range from -40°C to +85°C. The use of industrial-grade components ensures stable and long-term operation in demanding production and infrastructure environments.

Device configuration is performed using the dedicated SW67E01 software. The tool enables configuration of EtherCAT and Modbus RTU communication parameters, management of connected devices, and definition of data exchange cycles according to application requirements.

Product features

• EtherCAT Master for centralized EtherCAT network control
• Modbus RTU Master over RS485 interface
• Two RJ45 Ethernet ports with integrated EtherCAT switch
• Terminal block connectors for Modbus RTU and power supply
• DIN rail mounting (35 mm)
• Wide operating temperature range from -40°C to +85°C
• AC and DC power supply for flexible system integration

Technical specification

• Model: HD67E51-5-A1
• Function: EtherCAT Master / Modbus RTU Master
• Modbus interface: RS485
• EtherCAT protocol: EtherCAT Master
• Modbus RTU data rate: up to 115200 bps
• EtherCAT data rate: auto-sensing 10/100 Base-T
• Modbus connector: 3-pin 5 mm terminal block
• EtherCAT connector: RJ45
• Power supply: 8..24 V AC or 12..35 V DC
• Power supply connector: 2-pin 5 mm terminal block
• Operating temperature: -40°C to +85°C
• Dimensions: 120 x 23 x 107 mm
• Weight: approx. 200 g
• Mounting: DIN rail

HD67E51-5-A1 is a powerful and scalable solution for integrating EtherCAT-based systems with Modbus RTU RS485 devices in industrial automation applications. Its EtherCAT Master functionality, support for long-distance RS485 communication, and compact DIN rail housing make it an ideal choice for machine control systems, production lines, and complex industrial installations.

If you have questions regarding device selection, configuration, or testing, contact the Consteel Electronics team .