Industrial Modbus Ethernet to Serial Server with Multi-mode Fiber Port



Solve most any Modbus conversion challenge with the MESR Modbus Gateway

  • ASCII to RTU Conversion
  • ASCII or RTU to Modbus TCP Conversion
  • Remap conflicting Modbus ID’s
  • Add multiple masters to Modbus networks
  • Prioritize messages based on IP address, Modbus ID, and Function code
  • Convert mismatched serial baud rates and settings
  • Route Modbus traffic based on Modbus ID

MESR Modbus Gateways bridge devices on Modbus serial networks (RS-232, RS-422 or RS-485) with those on Modbus TCP networks, allowing seamless integration of any Modbus device. Each serial port is accessible over a LAN or WAN by up to 16 simultaneous Modbus TCP masters. 

Simple Installation and Setup

  • Removable terminal blocks simplify power and data connections
  • Slimline IP30 DIN mount enclosure minimizes footprint
  • Simple configuration through the built-in web server, or Windows configuration software
  • Built-in traffic monitor for instant verification of successful installation and simple network diagnostics
  • Optional pass-through Ethernet port eliminates need for additional Ethernet switch port
  • Optional Fiber Optic Ethernet connections for long-distance and total noise immunity

Features Benefits
Slim, Industrial Enclosure Save DIN rail space while maintaining industrial ratings
Modbus Master/Slave Flexibility Modbus master or slave can be on any serial port or on the Ethernet port. Customizable to your application.
Web Server, Configuration Software Program through web browser or local port. Same user interface; no training required
Fiber Optic Connection Connect to fiber networks in your plant without converting to copper connections
Low Latency, High Throughput View status in real time
Heartbeat Connection Detects communication failures and automatically reconnects to keep the system online


  • Serial ports work with RS-232, RS-422/485 and are software configurable
  • Modbus RTU or ASCII
  • Supports up to 16 simultaneous Modbus TCP masters
  • Modbus messaging priority control (source or function code selectable)
  • Operating Temperature: -40 to 80


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