10 Best Ethernet Relay Module in 2026

Ethernet relay modules provide reliable remote control for industrial and smart applications using standard network connections. Choosing the right unit requires understanding protocol support, power input options, and safety isolation features for your specific setup.

We evaluated ten top-ranked modules based on communication standards, channel count, build quality, and ease of integration. Each product was assessed for compatibility with common industrial protocols like Modbus and flexible power delivery methods including PoE.

Each pick details key specifications, standout benefits, and ideal use cases to help you match the device to your project needs. Keep in mind that availability and pricing can vary over time, so verify current stock before ordering.

Top 3 Picks for Best Ethernet Relay Module

Top 10 Best Ethernet Relay Module in 2026 Compared

The following table compares all ten Ethernet relay modules side by side, highlighting channel count, protocol support, power options, and key industrial features to help you identify the best fit for your network automation project.

1. Industrial 8-Ch ESP32-S3 WiFi Relay Module – Best Overall Ethernet Relay Module

4.8Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

ESP32-S3 microcontroller

Up to 240MHz speed

Integrated WiFi and Bluetooth

PoE network power

This industrial module stands out for its powerful ESP32-S3 microcontroller and versatile connectivity options. With a high 4.8 rating, it delivers reliable performance for demanding automation projects that require both wired and wireless control.

Pros

• Dual protocol support flexibility
• Robust isolation protection
• High speed processor
• Wide power input range
• Multiple connection options

Cons

• Complex setup for beginners
• Higher cost point

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The onboard RS485 and Ethernet ports allow seamless integration into existing industrial networks, while the built-in PoE module simplifies cabling by combining data and power in one line. The dual-core processor ensures fast response times and stable operation under heavy load.

While the feature set is comprehensive, initial configuration may require familiarity with network protocols and development environments. The higher price reflects the premium components and industrial-grade construction, which justifies the cost for critical applications.

Ideal for engineers and advanced users managing smart factories or complex home automation systems, this unit offers the best balance of performance and connectivity. Its robust design and flexible interface make it a top choice for long-term deployment.

Advanced Processing Power

The 32-bit LX7 dual-core processor running up to 240MHz handles multiple tasks simultaneously without lag.

Flexible Connectivity

Support for RS485, Ethernet, WiFi, and Bluetooth enables integration into almost any modern control system.

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2. 8-CH Ethernet Relay Module (B) – Best Premium Ethernet Relay Module

4.9Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module (B)

8 relay channels

Digital input support

Modbus RTU TCP

IEEE 802.3af PoE

This module earns a near-perfect 4.9 rating for its reliability and ease of use in industrial settings. It supports both Modbus RTU and TCP protocols, making it compatible with a wide range of PLCs and SCADA systems.

Pros

• Highest customer rating
• Comprehensive protocol support
• Web browser configuration
• Optocoupler isolation
• Rail-mount ABS case

Cons

• Requires Ethernet network
• Manual setup steps

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The inclusion of digital inputs allows for sensor feedback and status monitoring alongside relay control. Configuration via web browser simplifies network setup, while DHCP and DNS support ensure flexible IP management in complex networks.

The main trade-off is the dependency on a stable Ethernet connection, which may limit deployment in remote locations without infrastructure. The premium price reflects the high build quality and extensive protection features built into the design.

Best suited for industrial control panels or automated facilities requiring precise, networked relay control, this unit delivers exceptional stability. Its robust isolation and protection circuits ensure safe operation even in electrically noisy environments.

Modbus Protocol Flexibility

Support for both RTU and TCP variants ensures compatibility with legacy and modern industrial controllers.

Enhanced Safety Features

Bi-directional optocoupler isolation protects the control circuit from high-voltage interference and faults.

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3. Pinhaijing LAN Ethernet 2 Way Relay Board – Best Budget Ethernet Relay Module

4.8Editor scoreCheck price on Amazon

Pinhaijing LAN Ethernet 2 Way Relay Board

2 relay channels

TCP UDP controller

Web server interface

STC microcontroller

This budget-friendly module provides essential Ethernet relay control with a simple web-based interface. With a 4.8 rating, it delivers solid performance for smaller projects where cost and ease of use are top priorities.

Pros

• Affordable price point
• Simple web interface
• Compact PCB design
• Reliable microcontroller
• Easy installation

Cons

• Limited channel count
• Basic protocol support

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The built-in web server allows direct browser access to control relays without needing complex software. The military-grade FR-4 PCB ensures durability, while the compact size fits easily into tight enclosures or small control boxes.

The limited two-channel design means it may not suit large-scale automation needs, but it excels for specific, localized tasks. The lack of advanced protocols like Modbus restricts integration with industrial systems compared to higher-end models.

Perfect for hobbyists or small business owners needing basic remote switching for lights or alarms, this unit offers great value. Its straightforward setup and reliable operation make it an excellent entry point into Ethernet relay control.

Easy Web Control

The integrated web server provides a user-friendly interface for remote relay switching without additional software.

Durable Construction

Military-grade PCB materials ensure long-lasting reliability even in demanding environmental conditions.

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4. Waveshare 8-Ch Ethernet Relay Module – Solid Industrial Choice

4.1Editor scoreCheck price on Amazon

Waveshare 8-Ch Ethernet Relay Module

8 relay channels

Modbus RTU TCP

PoE port comms

Rail-mount ABS case

This module delivers standard industrial Ethernet relay functionality with Modbus protocol support and PoE capability. With a 4.1 rating, it offers reliable performance for basic automation tasks requiring networked control.

Pros

• Modbus protocol support
• PoE power option
• Optocoupler isolation
• Industrial rail-mount case
• Network indicator LEDs

Cons

• Moderate rating
• Few advanced features

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The rail-mount ABS case simplifies installation in control panels, while the optocoupler isolation protects against electrical interference. Network LEDs provide visual feedback on connection status, aiding troubleshooting during setup.

Users report moderate satisfaction compared to higher-rated models, likely due to limited configuration flexibility and documentation. The price point sits between budget and premium options, offering a middle-ground solution for standard industrial needs.

Recommended for facilities needing a no-frills, 8-channel Ethernet relay with Modbus support, this unit provides dependable operation. Its robust case and isolation features make it suitable for typical factory floor environments.

Industrial Enclosure Design

The ABS rail-mount case ensures secure installation and protection in standard electrical enclosures.

Visual Status Feedback

Built-in LEDs indicate network and signal status for quick visual troubleshooting and monitoring.

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5. Industrial 8-Ch ESP32-S3 WiFi Relay Module – Versatile Wireless Option

4.6Editor scoreCheck price on Amazon

Industrial 8-Ch ESP32-S3 WiFi Relay Module

ESP32-S3 processor

RS485 and Ethernet

Bluetooth and WiFi

Arduino IDE support

This module combines wired Ethernet and wireless WiFi with Bluetooth for maximum flexibility in remote control scenarios. With a 4.6 rating, it balances performance and connectivity for diverse automation applications.

Pros

• Dual wireless modes
• Comprehensive SDK
• Strong processor
• Multiple isolation circuits
• Relay and input channels

Cons

• Power consumption considerations
• Learning curve for SDK

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The onboard RS485 interface allows connection to Modbus devices, while the ESP32-S3 processor enables custom firmware development. Comprehensive SDK and online resources simplify development, making it accessible for custom integration projects.

Power usage may be higher than simpler modules due to the dual wireless radios, requiring careful power supply planning. The learning curve for the SDK might deter users seeking plug-and-play solutions without coding experience.

Ideal for developers and smart home enthusiasts needing both wired and wireless connectivity, this unit offers extensive customization. Its dual input and relay channels support complex monitoring and control tasks in a single compact device.

Development-Friendly Design

Full SDK and Arduino IDE support enable deep customization and integration into custom software ecosystems.

Hybrid Connectivity

Ethernet ensures stability while WiFi and Bluetooth provide flexibility for mobile device control.

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6. Waveshare 30-Ch Ethernet Relay Module – High Channel Capacity

4.2Editor scoreCheck price on Amazon

Waveshare 30-Ch Ethernet Relay Module

30 relay channels

Modbus RTU TCP

PoE power supply

Rail-mount case

Designed for large-scale automation, this 30-channel module offers extensive control capacity in a single unit. With a 4.2 rating, it provides reliable performance for projects requiring many independent relay outputs.

Pros

• High channel count
• Modbus protocol support
• PoE power delivery
• Industrial case
• Dedicated driver chip

Cons

• Larger physical size
• Higher complexity

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The dedicated relay driver chip ensures stable operation across all channels, even under varying load conditions. Modbus protocol support and PoE power simplify cabling and integration into existing industrial networks.

The larger size and complexity of managing 30 channels may require significant space and careful wiring planning. The price reflects the high channel count, making it a cost-effective solution for high-density control applications.

Best suited for large facilities or data centers needing centralized control of many devices, this module delivers robust performance. Its industrial-grade construction and protection circuits ensure long-term reliability in demanding environments.

High Density Control

Thirty independent relay channels allow management of extensive systems from a single networked unit.

Stable Driver Circuit

Dedicated driver chips with flyback diode protection ensure consistent relay performance across all channels.

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7. Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module – Advanced Processor

4.7Editor scoreCheck price on Amazon

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay Module

Xtensa LX7 dual-core

240MHz clock speed

Isolated RS485

USB Type-C debug

This module combines the powerful ESP32-S3 processor with industrial connectivity features for high-performance automation. With a 4.7 rating, it is praised for its speed and comprehensive documentation and support resources.

Pros

• High clock speed
• Isolated RS485 port
• USB-C debug port
• RTC chip for scheduling
• Official Wiki resources

Cons

• Advanced pricing
• Requires technical setup

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The isolated RS485 interface ensures safe communication with industrial sensors, while the USB-C port simplifies firmware updates and debugging. The built-in RTC chip enables scheduled tasks without needing external controllers.

The advanced features come at a premium price and require technical knowledge to fully utilize. The detailed Wiki resources help reduce the learning curve, but casual users may find the capabilities excessive.

Ideal for advanced projects requiring precise timing and industrial bus integration, this unit offers exceptional flexibility. Its strong processor and isolation features make it suitable for complex, reliability-critical applications.

Timing Precision

Built-in real-time clock chip allows scheduled automation tasks without external microcontroller support.

Developer Tools

USB-C debug port and official Wiki provide easy access for firmware updates and technical support.

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8. Waveshare 8-Ch Ethernet Relay Module (B) – Balanced Features

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Waveshare 8-Ch Ethernet Relay Module (B)

8 relay channels

Digital input linkage

PoE port comms

Rail-mount ABS case

This variant adds digital input functionality to standard Ethernet relay control, enabling sensor-driven automation. With a 4.2 rating, it offers reliable performance for projects requiring both input monitoring and output control.

Pros

• Digital input support
• Linkage control option
• Modbus protocol
• PoE supply
• Rail-mount design

Cons

• Standard performance
• Complex configuration

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The digital input supports passive and active signals with optocoupler isolation, while debouncing algorithms ensure clean signals. Linkage control allows direct relay triggering based on input states without external programming.

Configuration involves multiple network settings that can be time-consuming for first-time users. The 8-channel design fits most mid-sized projects but may lack scalability for larger installations.

Best for users needing basic input feedback alongside relay outputs, this module provides balanced functionality at a reasonable price. Its industrial case and PoE support simplify installation in controlled environments.

Input Monitoring Capability

Digital input channels allow direct connection to sensors or switches for automated triggering.

Linkage Logic

Built-in linkage control simplifies automation by connecting inputs directly to outputs without coding.

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9. 8-CH Ethernet Relay Module – Reliable Standard Option

4.0Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

8 relay channels

Modbus RTU TCP

PoE power supply

Rail-mount case

This standard 8-channel module provides essential Ethernet relay control with Modbus and PoE options. With a 4.0 rating, it delivers adequate performance for basic industrial and home automation needs.

Pros

• Modbus support
• PoE power
• Optocoupler isolation
• Flash function
• Standard specs

Cons

• Average ratings
• Limited documentation

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The flash-on/off function allows temporary relay activation via command, useful for testing or brief control tasks. Isolation circuits protect against voltage interference, while the rail-mount case ensures secure installation.

User feedback indicates average satisfaction, often due to less detailed documentation compared to branded competitors. The feature set is solid but lacks advanced connectivity or customization options found in higher-end models.

Recommended for straightforward networked relay control where Modbus and PoE are sufficient, this unit offers value. Its reliable hardware and protection features make it a workable choice for standard deployment scenarios.

Flash Control Function

Built-in flash-on/off commands allow temporary relay activation for testing or brief automated tasks.

Standard Network Control

Support for TCP and UDP modes allows integration with common network control protocols and software.

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10. 8-CH Ethernet Relay Module – Basic Industrial Unit

3.4Editor scoreCheck price on Amazon

8-CH Ethernet Relay Module

8 relay channels

Modbus RTU TCP

PoE power supply

Rail-mount case

This entry-level module offers essential 8-channel relay control over Ethernet with Modbus and PoE support. With a 3.4 rating, it serves basic needs but may fall short for demanding industrial reliability standards.

Pros

• Modbus protocols
• PoE power
• Wide voltage input
• Basic isolation
• Rail-mount design

Cons

• Lower customer rating
• Basic support

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The wide DC voltage range and PoE option provide flexible power delivery for varied installations. Basic optocoupler isolation helps protect against electrical faults, while the rail-mount case simplifies panel integration.

Lower ratings suggest potential connectivity or durability issues under heavy use, making it better suited for light-duty tasks. Support resources are limited, which may extend troubleshooting time for network setup.

Best for non-critical applications or prototypes where cost is a primary factor, this unit provides basic networked relay control. Its industrial-style case and isolation offer some protection, though it is less robust than higher-rated alternatives.

Power Flexibility

Wide DC input and PoE options allow installation in locations with limited power access.

Basic Industrial Design

Rail-mount case and isolation circuits provide standard industrial installation compatibility and protection.

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Buying Guide – How to Choose the Best Ethernet Relay Module

Selecting the right Ethernet relay module requires evaluating protocols, power options, channel count, and safety features to match your specific automation needs.

Communication Protocol Support

Verify whether the module supports Modbus RTU, Modbus TCP, HTTP, MQTT, or custom TCP/UDP commands to ensure compatibility with your existing controllers, SCADA systems, or smart home hubs.

Choose a module that speaks the same protocol language as your network devices to avoid extra gateways and integration complexity.

Power Supply Options

Look for wide DC voltage input ranges and Power over Ethernet (PoE) compliance to simplify installation by reducing the need for separate power adapters and cabling.

PoE support is particularly valuable in remote or industrial locations where running dedicated power lines is difficult or costly.

Channel Count and Type

Determine the number of relay channels you need now and for future expansion, considering whether digital inputs are required for sensor feedback or status monitoring.

Higher channel modules like 30-channel units offer scalability but may be bulkier, while 2-channel options suit simple tasks.

Isolation and Protection Features

Optocoupler isolation protects the control electronics from high-voltage interference on the relay side, ensuring safety and reliability in noisy industrial environments.

Reverse-proof circuits and dedicated driver chips prevent damage from incorrect wiring or electrical surges.

Enclosure and Mounting

Rail-mount ABS cases simplify integration into standard electrical panels and provide physical protection for indoor industrial use.

Ensure the dimensions and mounting style fit your existing control cabinet or enclosure without requiring custom modifications.

Configuration and Management

Web browser interfaces, DHCP/DNS support, and software utilities streamline network setup and ongoing device management without requiring specialized tools.

Look for modules that allow easy IP assignment and status monitoring for efficient maintenance.

Processor and Performance

Modules with powerful microcontrollers like ESP32-S3 offer faster response times and support for custom firmware or advanced automation logic.

Higher processing power is beneficial for complex tasks, scheduling, or multi-protocol operations.

Vendor Support and Documentation

Comprehensive documentation, SDKs, and official wiki resources reduce setup time and help resolve integration issues quickly.

Prioritize brands known for reliable customer support and active developer communities for long-term project success.

How to Use and Care for Your Ethernet Relay Module

Connect the module to your network via Ethernet cable and assign a static IP or rely on DHCP. Use the provided configuration tool or web interface to set up communication parameters like Modbus addresses and relay states.

Ensure the power supply matches the specified voltage range and includes proper fusing for safety. Use shielded cables for RS485 or digital inputs to minimize interference in electrically noisy environments.

Regularly check connection status LEDs and firmware updates to maintain reliability. Keep the unit clean and free of dust, and avoid exposing it to temperatures beyond its rated operating range.

Frequently Asked Questions

Final Thoughts on Choosing the Best Ethernet Relay Module

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