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Moxa MGate MB3180 1-Port Modbus Gateway for Modbus TCP to RTU/ASCII Protocol Conversion

Name: Moxa MGate MB3180 1-Port Modbus Gateway for Modbus TCP to RTU/ASCII Protocol Conversion
Rating: 4.2 (14 reviews)

Brand Moxa

Model Number MB3180

UPC N/A

Manufacture Warranty

EpicRise Warranty 1 Year

Product Highlights

• Single-port gateway converts between Modbus TCP and Modbus RTU/ASCII protocols with Auto Device Routing for simplified SCADA integration

• Supports up to 16 simultaneous Modbus TCP masters with 32 concurrent requests per master and up to 31 RTU/ASCII serial slave devices

• Software-selectable RS-232/422/485 serial interface with baud rates from 50 bps to 921.6 kbps for flexible legacy device connectivity

• 1.5 kV magnetic isolation protection on Ethernet port with IP30-rated metal housing for industrial environment durability

• DIN-rail mountable design with 12-48 VDC input and 5-year warranty backed by 2.7 million hours MTBF reliability rating

Overview
Specifications
FAQ
User Guides
Reviews

Seamless Modbus Protocol Conversion for Industrial Networks

The Moxa MGate MB3180 is a single-port Modbus gateway designed to bridge the gap between modern Modbus TCP networks and legacy Modbus RTU/ASCII serial devices. Enterprise IT teams managing industrial automation infrastructure face the ongoing challenge of integrating older serial equipment with contemporary Ethernet-based SCADA systems. The MB3180 eliminates this compatibility barrier by providing transparent bidirectional protocol conversion, enabling up to 16 simultaneous Modbus TCP masters to communicate with up to 31 serial slave devices through a single RS-232/422/485 port.

Built for industrial environments, this gateway features 1.5 kV magnetic isolation on the Ethernet interface and an IP30-rated metal housing to withstand electrical disturbances and harsh conditions. The Auto Device Routing feature simplifies configuration with single-click slave ID table setup, dramatically reducing deployment time compared to manual mapping. With support for all major Modbus function codes and individual serial port configuration for different baud rates and protocol modes, the MB3180 provides the flexibility needed for complex multi-vendor installations.

Backed by Moxa's 5-year warranty and a 2.7 million hour MTBF rating, the MB3180 delivers the reliability enterprise decision-makers require for mission-critical industrial networks. Multiple configuration options including web console, Telnet, and dedicated management utilities ensure seamless integration into existing IT infrastructure and remote management workflows.

Best For

The MB3180 is engineered for enterprise environments requiring reliable integration of legacy Modbus serial devices with modern TCP/IP networks across manufacturing, energy, and building automation sectors.

- SCADA System Integration: Connect legacy PLCs, RTUs, and field instruments using Modbus RTU/ASCII to centralized Modbus TCP-based SCADA platforms without replacing existing equipment

- Manufacturing Plant Modernization: Bridge older serial production equipment with Industry 4.0 Ethernet infrastructure to enable real-time data collection and remote monitoring capabilities

- Building Management Systems: Integrate serial HVAC controllers, power meters, and environmental sensors with IP-based building automation networks for centralized facility management

- Energy Distribution Networks: Connect Modbus RTU power monitoring devices and substation equipment to TCP-based energy management systems for grid monitoring and control

- Water/Wastewater Treatment: Enable remote monitoring of serial-connected pumps, valves, and sensors through Ethernet SCADA systems in distributed utility infrastructure

Key Features

- Bidirectional protocol conversion between Modbus TCP (client/server) and Modbus RTU/ASCII (master/slave) with support for function codes 1, 2, 3, 4, 5, 6, 15, 16, and 23

- Auto Device Routing technology enables single-click slave ID table configuration for rapid SCADA integration without manual address mapping

- Supports up to 16 simultaneous Modbus TCP master connections with 32 concurrent requests per master for high-demand industrial applications

- Software-selectable RS-232/422/485 serial interface with individual configuration for Modbus RTU or ASCII modes and baud rates from 50 to 921.6 kbps

- 1.5 kV built-in magnetic isolation on 10/100BaseT Ethernet port with auto MDI/MDI-X connection protects against electrical disturbances

- Multiple configuration methods including web console (HTTP), Telnet, Device Search Utility, and MGate Manager for flexible deployment and remote management

- IP30-rated metal housing with DIN-rail mounting capability (optional DK-35A kit) and wide 12-48 VDC input voltage range for industrial installations

- SNMPv1/v2c/v3 support with MIB RFC1213 and RFC1317 compliance enables integration with enterprise network monitoring systems

Quick Specs

Ethernet Interface	1 x 10/100BaseT(X) RJ45 port with auto MDI/MDI-X, 1.5 kV magnetic isolation
Serial Interface	1 x DB9 male, RS-232/422/485 software selectable
Serial Parameters	50 bps to 921.6 kbps baud rate, 7/8 data bits, None/Even/Odd/Space/Mark parity, 1/2 stop bits
Modbus Protocol	Modbus TCP Client/Server, Modbus RTU/ASCII Master/Slave, function codes 1-6, 15, 16, 23
TCP Master Support	Up to 16 simultaneous Modbus TCP masters, 32 requests per master
Serial Slave Support	Up to 31 Modbus RTU/ASCII slave devices per serial port
Configuration	Web console (HTTP), Telnet, Device Search Utility, MGate Manager, MCC Tool
Management Protocols	SNMPv1/v2c/v3, DHCP, DNS, TCP/IP, ARP, UDP
Security	SNMPv3, AES-128/256 encryption, SHA-256, local database authentication
Power Input	12 to 48 VDC, 200 mA @ 12 VDC, power jack connector
Operating Temperature	0 to 55°C (32 to 131°F) standard; 0 to 40°C with power adapter
Humidity	5 to 95% RH non-condensing
Housing	Metal, IP30 protection rating
Dimensions (with ears)	22 x 75 x 80 mm (0.87 x 2.95 x 3.15 in)
Weight	340 g (0.75 lb)
Mounting	DIN-rail (requires optional DK-35A kit), wall mount, desktop
Certifications	UL 60950-1/62368-1, EN 62368-1, CE EN 55032/35, FCC Part 15B Class A
MTBF	2,762,384 hours (Telcordia SR-332)
Warranty	5 years

What's Included

- 1 x MGate MB3180 Modbus gateway

- 1 x Power adapter (region-specific)

- 4 x Stick-on mounting pads

- 1 x Quick installation guide

- 1 x Document & software CD

Product Details
Power Source	DC-powered

What industrial environments and network architectures is the MB3180 best suited for?

The MB3180 is designed for single-point Modbus protocol conversion in industrial facilities requiring one serial device segment to communicate with multiple TCP masters. It handles environments with up to 31 serial slaves on one RS-232/422/485 line serving up to 16 simultaneous Modbus TCP SCADA connections. Facilities needing 2 or 4 independent serial segments should consider the MB3280 or MB3480 models from the same series.

How does the MB3180 compare to the MB3280 and MB3480 in the same MGate series?

The MB3180 provides one serial port while the MB3280 offers two ports and the MB3480 provides four ports—all with identical protocol conversion capabilities and TCP master support. Choose the MB3180 when you have a single serial network segment to integrate. The MB3180 uses only a power jack connector, whereas MB3280/MB3480 offer both power jack and terminal block options for redundant power source flexibility.

Is the MB3180 cost-effective for small-scale Modbus integration projects?

The MB3180 delivers strong value for single-segment deployments with its 5-year warranty, 2.7 million hour MTBF rating, and support for up to 16 concurrent TCP masters. Facilities with only a few serial devices gain enterprise-grade reliability without paying for unused ports. Projects requiring multiple independent serial segments achieve better port-cost efficiency by specifying the multi-port MB3280 or MB3480 instead of deploying multiple MB3180 units.

What Modbus master and slave systems is the MB3180 compatible with?

The MB3180 works with any standards-compliant Modbus TCP master (including major SCADA platforms) and Modbus RTU/ASCII serial slaves supporting function codes 1, 2, 3, 4, 5, 6, 15, 16, and 23. Serial devices must operate within 50 bps to 921.6 kbps baud rates and connect via RS-232, RS-422, or RS-485 interfaces. The gateway supports mixed RTU and ASCII devices when using multiple MB3180 units, but each individual MB3180 serial port operates in either RTU or ASCII mode at a time.

What is the maximum number of serial slave devices the MB3180 can support?

The MB3180 supports up to 31 Modbus RTU or ASCII serial slave devices on its single RS-232/422/485 port. This slave count applies whether the gateway operates in master or slave mode on the serial side. The device also handles up to 16 simultaneous Modbus TCP master connections with 32 concurrent requests per master on the Ethernet side.

Does the MB3180 support HTTPS and SMTP for secure remote management?

The MB3180 does not include HTTPS or SMTP functionality according to the official datasheet—these protocols are available only on the MB3280 and MB3480 models. The MB3180 provides HTTP web console, Telnet, SNMPv1/v2c/v3, and Device Search Utility for configuration and monitoring. Deployments requiring encrypted web management or email alerting should specify the MB3280 or MB3480 instead.

What DIN-rail mounting hardware is required for the MB3180?

The MB3180 requires the optional DK-35A DIN-rail mounting kit, which is sold separately and designed for standard 35 mm DIN rails. The gateway ships with four stick-on pads for desktop placement and includes mounting ear dimensions (22 x 75 x 80 mm) for wall installation using customer-supplied screws. Wall mounting requires two screws with 5.0-7.0 mm heads, 3.0-4.0 mm shafts, and minimum 10.5 mm length.

Can the MB3180 operate on 24 VDC power from a DIN-rail power supply?

Yes, the MB3180 accepts 12 to 48 VDC input and draws 200 mA at 12 VDC, making it fully compatible with standard 24 VDC industrial power supplies. Moxa offers optional DIN-rail power supplies including the DR-4524 (45W/2A), DR-75-24 (75W/3.2A), and DR-120-24 (120W/5A) for rack installations. The MB3180 uses a power jack connector, whereas the MB3280/MB3480 models provide both power jack and terminal block connections.

Regular price: $215.00
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