RS485 to Ethernet Converter RS232 RS485 RS422 Serial Server Module with Bidirectional Modbus Conversion and Web Configuration Interface

RS485 to ETHM04 4CH RS485 To ETH Converter Overview A compact 4channel serial to Ethernet converter designed to bridge Ethernet MODBUS TCP devices and serial MODBUS RTU devices. Supports bidirectional protocol conversion, independent transparent TCP to serial channels, and web page configuration for fast setup and flexible deployment. Item weight 0.11 pounds. Key benefits Integrate Ethernet and serial equipment quickly: provides MODBUS TCP to MODBUS RTU conversion and MODBUS RTU to MODBUS TCP conversion to connect Ethernet masters to serial slaves or vice versa. Flexible deployment and control: each channel supports independent transparent TCP to serial operation while the module acts as a TCP server. Easy configuration and compatibility: web page configuration for serial and network parameters, with configurable slave station attributes and communication formats. Reliable long distance serial links: RS485 and RS422 ports support long transmission distances for industrial installations. Broad baud rate support and configurable framing for compatibility with diverse serial devices. Features Protocol conversion: MODBUS TCP to MODBUS RTU and MODBUS RTU to MODBUS TCP. Independent transparent transmission: TCP to RS485, TCP to RS422, and TCP to RS232 channels; each channel can be configured via web interface and operates as a server. Web configuration: set communication parameters, network settings, and perslave attributes through a browser interface. Physical interfaces: RS485 via screw terminal, RS422 channel available, RS232 via DB9 male connector, and Ethernet network port. Baud rate support: 9600 to 115200, default 9600. Default communication format: 8bit data, 1bit stop, no parity. Framing is configurable. Transmission distance: up to 1200 meters for RS485 and RS422 lines. Technical specifications COM1 (RS485 communication parameters) Primary function: MODBUS RTU to MODBUS TCP and MODBUS TCP to MODBUS RTU Transparent transmission between 485 port and network port Interface type: RS485, screw terminal Baud rate: 9600 to 115200 (default 9600) Communication format: MODBUS RTU; 8bit data, 1bit stop, no parity (configurable) Transmission distance: 1200 meters COM2 (RS422 communication parameters) Support function: TCP to RS422 transparent transmission Interface type: RS485, screw terminal Baud rate: 9600 to 115200 (default 9600) Communication format default: 8bit data, 1bit stop, no parity (configurable) Transmission distance: 1200 meters COM3 (RS232 communication parameters) Support function: TCP to RS232 transparent transmission Interface type: RS232, DB9 terminal male Baud rate: 9600 to 115200 (default 9600) Communication format: configurable Practical use scenarios Industrial automation: Connect legacy MODBUS RTU sensors and actuators to a central MODBUS TCP controller or SCADA system for remote monitoring and control. Remote data acquisition: Convert serial output from data loggers or meters to Ethernet for centralized data collection and analysis over a network. Equipment integration: Provide a network gateway for RS232 and RS422 devices, enabling integration of serial machinery or instruments into an Ethernetbased control system. What makes this product stand out True bidirectional MODBUS conversion plus independent transparent TCP to serial channels simplifies integration between modern Ethernet equipment and existing serial installations. Webbased parameter configuration reduces commissioning time and avoids manual DIP switch changes. Support for longdistance RS485 and RS422 links and a wide range of baud rates makes it suitable for varied industrial environments. Compatibility and notes Compatible with devices using MODBUS TCP and MODBUS RTU protocols and standard RS232, RS422, and RS485 serial interfaces. Default settings use 9600 baud and 8 data bits, 1 stop bit, no parity; adjust parameters through the web interface to match connected devices.