MB3180 MOXA MGate Modbus TCP to RTU/ASCII Gateway

The MB3180 MOXA (MGate MB3180) is an industrial-grade, 1-port Modbus gateway engineered to integrate legacy Modbus RTU or Modbus ASCII serial devices directly into modern Modbus TCP Ethernet networks. Featuring a software-selectable DB9 serial port supporting RS-232, RS-422, and 2-wire/4-wire RS-485 interfaces, the MB3180 MOXA bridges the gap between field sensors, power meters, PLCs, and centralized SCADA or industrial control systems.

Designed for high-density networking, the MB3180 MOXA supports up to 16 simultaneous Modbus TCP master connections and can communicate with up to 31 Modbus RTU/ASCII slave devices per serial port. Built with automatic serial data direction control (ADDC®) and intuitive web/utility configuration tools, it ensures fast deployment, minimal network latency, and reliable data routing in industrial automation environments.

Key Features of the MB3180 MOXA

• Seamless Protocol Conversion: Converts bidirectionally between Modbus TCP (Ethernet) and Modbus RTU/ASCII (Serial) protocols.

• 3-in-1 Software Selectable Serial Port: Configurable DB9 male port supporting RS-232, RS-422, and RS-485 pinouts without requiring hardware jumpers.

• High Density Master/Slave Capacity: Handles up to 16 TCP masters simultaneously while routing commands to 31 serial RTU/ASCII slaves.

• Automatic Data Direction Control (ADDC®): Simplifies 2-wire and 4-wire RS-485 wiring management by handling RS-485 driver enable timing automatically.

• Compact & Rugged Form Factor: Durable metal housing equipped with DIN-rail or wall mounting options for space-constrained electrical enclosures.

• Simple Utility & Web Setup: Configurable using Moxa’s MGate Manager utility or standard web browsers across Ethernet setups.

Primary Applications

• Power & Energy Monitoring: Integrating RS-485 Modbus RTU digital energy meters into Modbus TCP SCADA software (e.g., Ignition, Wonderware)

• Industrial Automation & PLC Interfacing: Bridging legacy serial PLCs and RTUs to centralized Ethernet supervisory controls

• Vessel Telemetry & Building Automation: Unifying temperature transducers, flow meters, and HVAC controllers on Ethernet backbones

Technical Specifications

Package Contents

• 1 × MB3180 MOXA MGate Gateway Unit

• Power Adapter (100–240V AC to 12V DC input adapter)

• Quick Installation Guide & Document Access Sheet