Detailed Guide for Industrial & IoT Applications
In 2025, Modbus Gateways will remain a crucial part of industrial automation, the Internet of Things (IoT), and energy management systems. They allow seamless communication between different devices and protocols, enabling efficient data exchange in factories, buildings, and smart infrastructure.
If you’re searching for the 5 Best Modbus Gateways in 2025, you’re in the right place. This guide compares the most reliable and feature-rich models available, so you can make an informed choice for your project.
What is a Modbus Gateway?
A Modbus Gateway is a networking device that acts as a translator between different Modbus communication formats and protocols. Common uses include:
- Converting Modbus RTU/ASCII to Modbus TCP/IP
- Bridging Modbus with other protocols such as EtherNet/IP, PROFINET, MQTT, BACnet
- Integrating legacy industrial devices into modern IoT platforms
- Enabling remote monitoring and control
Why Choosing the Right Modbus Gateway Matters in 2025
As industries move towards Industry 4.0, Modbus gateways now do more than just protocol conversion. The 5 Top Best Modbus Gateways in 2025 don’t just bridge protocols—they also offer:
- High data throughput for real-time monitoring
- Enhanced cybersecurity with TLS encryption and firewall features
- Cloud-ready features like MQTT, REST API, and OPC UA
- Rugged designs for harsh environments
- Easy configuration tools to save engineering time
The 5 Best Modbus Gateways in 2025
1. Moxa MGate MB3660 Series
Best for: Large-scale industrial deployments with redundancy needs.
Key Features:
- Converts between Modbus TCP and Modbus RTU/ASCII
- Handles up to 256 TCP clients or 128 TCP servers
- Dual Ethernet ports with redundant power inputs
- 2 kV isolation for safety in harsh environments
- Certifications: ATEX Zone 2, Class 1 Division 2
Why It’s a 2025 Favorite:
The MB3660 series is known for reliability, industrial-grade build quality, and unmatched redundancy features. In large factories or power plants, where downtime is costly, this gateway ensures continuous communication even during network failures.
2. Moxa MGate 5105-MB-EIP
Best for: Industrial IoT (IIoT) and multi-protocol environments.
Key Features:
- Converts Modbus RTU/ASCII/TCP ↔ EtherNet/IP
- Built-in MQTT for cloud integration
- Web-based configuration with diagnostic tools
- Data mapping for seamless integration
- Compact, DIN-rail mountable design
Why It’s Popular in 2025:
IIoT projects often require bridging Modbus with newer protocols like EtherNet/IP and sending data to the cloud. The 5105-MB-EIP makes this process easy, with minimal setup and robust performance.
3. Opto 22 GRV-EPIC-PR2
Best for: Edge computing with advanced security.
Key Features:
- Linux-based controller with integrated gateway features
- Dual Ethernet ports for network segmentation
- Built-in firewall, VPN, LDAP authentication
- Node-RED for data flow automation
- Touchscreen interface for local control
- Wide temperature range: -20°C to +70°C
Why It Shines in 2025:
This device isn’t just a Modbus gateway—it’s an edge computing powerhouse. It can collect, process, and visualize data locally, then send it securely to cloud platforms. Perfect for smart factories and remote sites.
4. Red Lion Data Station Plus
Best for: Data logging and visualization-heavy applications.
Key Features:
- Supports multiple industrial protocols, including Modbus
- Advanced data logging and trending
- Easy integration with HMIs and SCADA systems
- Remote access capabilities
- Rugged metal enclosure for industrial use
Why It’s Still a Top Pick:
Red Lion’s Data Station Plus is trusted for data-intensive applications where visualization and historical trends matter. In 2025, it’s still a go-to for water treatment plants, manufacturing lines, and energy systems.
5. Siemens Scalance M873-2
Best for: High-security and redundant network infrastructure.
Key Features:
- Supports Modbus TCP, MQTT, and other industrial protocols
- Enterprise-level VPN and firewall features
- Redundant communication paths
- Siemens’ industrial automation integration
- Suitable for critical infrastructure projects
Why It’s Essential in 2025:
When security is a priority—like in power distribution or transportation—this Siemens gateway delivers reliable, protected data exchange with industry-leading network resilience.
Quick Comparison Table — 5 Top Best Modbus Gateways in 2025
| Rank | Model | Key Strength | Ideal Use Case |
|---|---|---|---|
| 1 | Moxa MGate MB3660 | Heavy-duty, high-redundancy | Large industrial networks |
| 2 | Moxa MGate 5105-MB-EIP | Multi-protocol + MQTT cloud integration | IIoT projects |
| 3 | Opto 22 GRV-EPIC-PR2 | Edge computing + security | Smart factories |
| 4 | Red Lion Data Station Plus | Data logging & visualization | Process monitoring |
| 5 | Siemens Scalance M873-2 | Secure, redundant networking | Critical infrastructure |
Buying Guide — How to Choose the Best Modbus Gateway in 2025
When selecting a Modbus gateway, consider the following factors:
- Protocol Support — Ensure compatibility with your required protocols (e.g., Modbus RTU, TCP, EtherNet/IP, MQTT).
- Data Throughput — Higher data rates are essential for real-time applications.
- Security Features — Look for VPN, TLS, firewall, and authentication options.
- Installation Environment — Check temperature range, enclosure rating, and certifications.
- Ease of Configuration — Web-based UI and diagnostic tools can save setup time.
- Cloud Integration — For IoT projects, MQTT and REST API support are valuable.
