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Automation Networks

ACE650 Modbus Gateway

The ACE650 Modbus Gateway is a robust industrial-grade device designed to bridge Modbus RTU/ASCII serial communication with Modbus TCP/IP networks. This type of gateway enables seamless integration of legacy serial Modbus devices with modern Ethernet-based systems, facilitating remote monitoring and control.

Key Features of the ACE650 Modbus Gateway

  1. Protocol Conversion: Converts Modbus RTU/ASCII to Modbus TCP/IP and vice versa, allowing seamless communication between serial and Ethernet-based Modbus devices.
  2. Dual Serial Ports: Typically supports multiple serial interfaces (RS232/RS485/RS422), providing flexibility to connect various types of Modbus devices.
  3. Ethernet Connectivity: Provides Ethernet ports for integration into TCP/IP networks, enabling remote access and control of Modbus devices over Ethernet.
  4. Industrial-Grade Design: Built to withstand harsh industrial environments with robust construction and reliable components.
  5. Configurable: Offers extensive configuration options for network settings, serial parameters, and Modbus protocol settings to suit different application requirements.
  6. Web-Based Management: Features a user-friendly web interface for easy configuration, monitoring, and management of the gateway.
  7. Multiple Operating Modes: Supports various operating modes such as Modbus RTU Master, Modbus RTU Slave, Modbus TCP Client, and Modbus TCP Server, enhancing versatility.
  8. LED Indicators: Equipped with LED indicators for power, link status, and data transmission, aiding in troubleshooting and monitoring.
  9. Security Features: Often includes security features such as IP filtering and password protection to ensure secure communication.

Applications of the ACE650 Modbus Gateway

  1. Industrial Automation: Connects Modbus RTU/ASCII devices such as PLCs, sensors, and actuators to Ethernet-based control systems for centralized monitoring and control.
  2. Building Automation: Integrates building management systems (BMS) with Modbus devices into Ethernet networks, enabling centralized control of HVAC, lighting, and security systems.
  3. Energy Management: Facilitates communication between Modbus-based energy meters and SCADA systems over Ethernet for real-time energy monitoring and management.
  4. Remote Monitoring: Enables remote monitoring and control of Modbus devices over the internet or local networks, enhancing operational flexibility and efficiency.
  5. Water and Wastewater Treatment: Integrates Modbus devices used in water and wastewater treatment plants with centralized control systems over Ethernet.

How to Use the ACE650 Modbus Gateway

  1. Physical Connection:
    • Connect the Modbus RTU/ASCII serial devices to the corresponding RS232/RS485/RS422 ports on the ACE650.
    • Connect the ACE650 to the Ethernet network using an Ethernet cable.
  2. Power Up:
    • Connect the power supply to the ACE650 and ensure it is powered on. Check the power LED indicator to confirm.
  3. Configuration:
    • Access the ACE650’s web-based management interface via a web browser. The default IP address is typically provided in the user manual.
    • Configure the network settings (IP address, subnet mask, gateway) to match your network environment.
    • Set the serial communication parameters (baud rate, data bits, stop bits, parity) to match the settings of the connected Modbus devices.
    • Configure the Modbus settings, specifying whether the gateway should operate as a Modbus RTU Master, Modbus RTU Slave, Modbus TCP Client, or Modbus TCP Server.
    • Save the configuration and restart the gateway if necessary.
  4. Testing and Deployment:
    • Test the communication between the Modbus devices and the Ethernet network to ensure data is being transmitted correctly.
    • Once confirmed, deploy the ACE650 in the desired location and integrate it with your control system or monitoring software.


The ACE650 Modbus Gateway is a versatile and reliable solution for integrating Modbus RTU/ASCII serial devices with modern Modbus TCP/IP networks. Its industrial-grade design, flexible configuration options, and robust performance make it suitable for various applications in industrial automation, building management, energy management, remote monitoring, and water treatment. By enabling seamless communication between serial and Ethernet-based Modbus devices, the ACE650 enhances operational efficiency and facilitates remote management and control.

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