Pinhaijing LAN Ethernet 2 Way Relay Board
4.8Editor score
Compact TCP UDP Controller
Industrial STC Microcontroller
Affordable Two Channel Design
In this guide
Ethernet Relay Modules provide robust connectivity for industrial automation and smart home systems. These devices allow remote control of electrical loads through standard network infrastructure ensuring secure and reliable operation across various environments.
We analyzed ten leading models based on protocol support, power options, and physical design. Our comparison highlights devices that offer Modbus TCP, PoE, and wireless capabilities to help you select the right solution for your specific project requirements.
Each entry in this list details key specifications, strengths, and potential limitations found in real-world use. Prices and availability may change over time so please verify current details on the product pages before making your final purchase decision today.
Top 3 Picks for Best Ethernet Relay Module
8-CH Ethernet Relay Module (B)
4.9Editor score
8-Ch Digital Input Support
Modbus RTU TCP Protocol
PoE and Wide Voltage Input
Industrial 8-Ch ESP32-S3 WiFi Relay Module
4.8Editor score
ESP32-S3 Dual Core Processor
Integrated WiFi Bluetooth Support
Ethernet RS485 Port Options
Top 10 Best Ethernet Relay Module in 2026 Compared
The following table offers a side-by-side overview of key features across all ten selected models helping you quickly identify which device aligns with your connectivity and control needs.
ProductsSpecificationsEditor scorePrice
Best Budget
8-CH Ethernet Relay Module
8 Channels Relays
Modbus RTU TCP
PoE Power Supply
ABS Rail Mount Case
3.4Editor score
Editor's Choice
Waveshare 8-Ch Ethernet Relay Module
8 Channels Relays
Modbus RTU TCP
PoE Port Communication
LED Status Indicators
4.1Editor score
Best Premium
Industrial 8-Ch ESP32-S3 WiFi Relay Module
8 Channels Relays
ESP32-S3 Microcontroller
WiFi Bluetooth Support
RS485 Ethernet Ports
4.8Editor score
8-CH Ethernet Relay Module (B)
8 Channels Relays
Digital Input Support
Modbus RTU TCP
PoE Wide Voltage Input
4.9Editor score
Industrial 8-Ch ESP32-S3 WiFi Relay Module
8 Channels Relays
ESP32-S3 Processor
WiFi Bluetooth Remote
RS485 Interface
4.6Editor score
Waveshare 30-Ch Ethernet Relay Module
30 Channels Relays
Modbus RTU TCP
PoE Power Supply
Industrial Grade Case
4.2Editor score
Waveshare Industrial 8-Channel ESP32-S3
8 Channels Relays
Isolated RS485
WiFi Bluetooth Support
PoE Ethernet Port
4.7Editor score
Waveshare 8-Ch Ethernet Relay Module (B)
8 Channels Relays
Digital Input Support
Modbus RTU TCP
PoE Power Supply
4.2Editor score
Pinhaijing LAN Ethernet 2 Way Relay Board
2 Channels Relays
TCP UDP Controller
Web Server Mode
STC Microcontroller
4.8Editor score
8-CH Ethernet Relay Module
8 Channels Relays
Modbus RTU TCP
PoE Power Supply
Rail Mount Case
4.0Editor score
1. 8-CH Ethernet Relay Module (B) – Best Overall Ethernet Relay Module
8-CH Ethernet Relay Module (B)
8-Ch Relays Inputs
Modbus RTU TCP
PoE Power Option
Bi-Directional Isolation
This industrial 8-channel module stands out with a remarkable 4.9 rating reflecting its high reliability and user satisfaction. It combines Ethernet control with digital input capabilities making it ideal for automation systems requiring feedback loops alongside switching.
Pros
- Highest User Rating
- Robust Modbus Support
- Flexible Power Options
- Strong Isolation
- Configurable Web Interface
Cons
- Higher Price Point
- Complex Setup
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The device supports Modbus RTU and TCP protocols allowing seamless integration with SCADA systems and industrial controllers. Power flexibility is a major plus offering DC input or PoE for simplified cabling in remote locations where separate power sources are inconvenient.
While the feature set is comprehensive the configuration process might require technical knowledge of network protocols and Modbus addressing. Users should also note that while powerful this unit is designed for industrial settings rather than basic home tasks.
Ideal for engineers and advanced hobbyists managing smart factories or critical infrastructure this module delivers professional grade performance and stability. Its comprehensive feature set ensures long term reliability in demanding environments where consistent operation is non negotiable.
Industrial Protocol Support
The dual Modbus RTU and TCP support ensures compatibility with legacy and modern industrial equipment alike.
Power Flexibility
PoE compliance allows for simplified deployment in areas where running separate power cables is difficult.
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2. Pinhaijing LAN Ethernet 2 Way Relay Board – Best Budget Ethernet Relay Module
Pinhaijing LAN Ethernet 2 Way Relay Board
2-Ch Relays
TCP UDP Protocol
Web Server Mode
STC Microcontroller
This compact 2-way relay board offers an entry point into Ethernet automation at an accessible price point without sacrificing core functionality. It features an industrial STC microcontroller ensuring stable operation even with constant network traffic or power fluctuations.
Pros
- Most Affordable Option
- Compact Design
- Easy Web Control
- Industrial Chipset
- Status Indicators
Cons
- Only 2 Channels
- Limited Features
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Users can control the relays via TCP or UDP commands directly from a network application or browser which simplifies integration for small scale projects. The built-in web server allows for basic configuration and status monitoring without needing complex external software tools.
The limited channel count restricts this unit to very specific applications such as controlling a single light and fan or similar small tasks. Additionally the absence of advanced protocols like Modbus might limit scalability for larger automation systems requiring extensive device networking.
For DIY enthusiasts and small office setups needing simple remote switching this board provides excellent value and ease of use. It serves well as a proof of concept tool or a dedicated controller for isolated tasks where cost efficiency is paramount.
Cost Effective Solution
The low price point makes it accessible for users with tight budgets or limited project scopes.
Simple Web Interface
Direct browser access allows for quick configuration and monitoring without complex coding or setup.
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3. Industrial 8-Ch ESP32-S3 WiFi Relay Module – Best Premium Ethernet Relay Module
Industrial 8-Ch ESP32-S3 WiFi Relay Module
8-Ch Relays Inputs
ESP32-S3 Processor
WiFi Bluetooth Support
RS485 Ethernet Ports
This premium module leverages the powerful ESP32-S3 processor to deliver superior performance with built-in Wi-Fi and Bluetooth capabilities alongside traditional Ethernet. The inclusion of an RS485 port adds significant versatility for industrial sensor integration making it a top choice for comprehensive automation projects.
Pros
- Advanced ESP32-S3 Core
- Wireless Dual Mode
- Multiple Interface Options
- High Isolation
- Arduino IDE Support
Cons
- Complex Configuration
- Premium Price Tag
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Developers benefit from extensive SDK resources and Arduino IDE compatibility allowing for deep customization and custom firmware development. The robust isolation circuits ensure safety when dealing with high voltage loads while maintaining signal integrity for sensitive digital inputs on the board.
The richness of features means a steeper learning curve for those not familiar with microcontroller programming and network configuration. The higher price also positions this device for professional applications where the added processing power and connectivity options justify the extra investment.
Ideal for advanced users and industrial integrators requiring a single device for both wired and wireless connectivity this unit is unmatched in versatility. Its ability to handle complex logic and communication tasks makes it a future-proof investment for evolving smart infrastructure needs.
Enhanced Processing Power
The dual-core ESP32-S3 chip handles multiple tasks efficiently ensuring smooth operation under heavy loads.
Multi-Connectivity Options
Support for Ethernet RS485 Wi-Fi and Bluetooth allows flexible deployment in diverse network environments.
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4. Industrial 8-Ch ESP32-S3 WiFi Relay Module – High Performance Ethernet Relay Module
Industrial 8-Ch ESP32-S3 WiFi Relay Module
8-Ch Relays Inputs
ESP32-S3 Processor
WiFi Bluetooth Support
RS485 Interface
Similar to the top premium pick this variant focuses on the robust capabilities of the ESP32-S3 platform providing extensive control over local and remote operations. The onboard digital inputs and RS485 interface make it highly suitable for environments requiring both sensor feedback and actuator control.
Pros
- Dual Core Performance
- Rich Development SDK
- Versatile Connectivity
- High Voltage Rating
- Reliable Isolation
Cons
- Setup Complexity
- Technical Documentation
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The detailed SDK and online resources facilitate rapid prototyping and deployment allowing users to tailor the firmware to specific application needs. This flexibility ensures that the device can adapt to changing requirements over time without needing hardware replacement or major upgrades.
Users may find the extensive feature set overwhelming initially requiring careful study of the available tutorials and technical support. The high performance comes with a complexity cost that might not suit straightforward switching tasks where simpler modules could suffice effectively.
Best suited for developers and engineers building custom IoT solutions this module offers the raw power and connectivity needed for sophisticated automation. Its balance of wireless and wired options provides a comprehensive toolkit for modern industrial control applications.
Customizable Firmware
Open development resources allow for deep customization to match exact project specifications and logic.
Sensor Integration
The RS485 interface simplifies connection to industry standard sensors and instruments for data collection.
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5. 8-CH Ethernet Relay Module – Reliable Modbus Ethernet Relay Module
8-CH Ethernet Relay Module
8 Channels Relays
Modbus RTU TCP
PoE Power Supply
ABS Rail Mount
This industrial module offers standard Modbus RTU and TCP protocols making it a straightforward choice for environments already utilizing these communication standards. The inclusion of PoE power supply simplifies installation by reducing the need for separate power adapters in remote locations.
Pros
- Standard Modbus Support
- PoE Capability
- Rail Mount Design
- Flash Function Support
- Optocoupler Isolation
Cons
- Lower User Rating
- Basic Feature Set
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Features like flash-on and flash-off functions provide basic automation capabilities suitable for simple lighting control or signaling tasks. The ABS rail-mount case ensures the device can be securely installed in standard distribution cabinets providing a professional and organized appearance.
While functional the lower user rating suggests potential inconsistencies in reliability or support compared to higher rated competitors. Users should carefully test the unit in non-critical applications first to ensure it meets their specific stability and performance expectations.
Ideal for standard industrial setups requiring basic switching with Modbus integration this module provides a solid foundation for automation. It serves as a cost-effective entry point for users needing reliable networked control without advanced processing or wireless capabilities.
Standard Protocols
Native Modbus support ensures compatibility with a wide range of existing industrial controllers and software.
Simple Automation
Built-in flash functions allow for basic timed operations without external programming or control logic.
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6. Waveshare 8-Ch Ethernet Relay Module – Secure Industrial Relay Module
Waveshare 8-Ch Ethernet Relay Module
8 Channels Relays
Modbus RTU TCP
PoE Power Supply
LED Indicators
This Waveshare module emphasizes safety and visibility with robust isolation circuits and clear LED indicators for monitoring relay status. The industrial grade rail-mount case ensures secure installation while the inclusion of PoE simplifies wiring in environments where power access is limited.
Pros
- Strong Isolation
- LED Status Indicators
- Rail Mount Case
- MQTT Support
- PoE Capability
Cons
- Mid Range Rating
- Basic Web Interface
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Support for MQTT protocols allows integration with modern cloud-based automation platforms enabling remote monitoring and control over the internet. The flash-on and flash-off features provide simple scheduling options for basic tasks like lighting or signaling without complex external schedulers.
While the reliability is solid the basic nature of the interface might limit advanced configuration capabilities for power users. It is best suited for applications where stability and ease of installation are more critical than extensive customization options.
Ideal for small to medium industrial setups this module offers a balance of security and functionality. Its focus on safety and clear status monitoring makes it a practical choice for environments where reliability and ease of troubleshooting are important.
Visible Status
LED indicators provide immediate visual feedback on relay states aiding in quick troubleshooting and monitoring.
Cloud Integration
MQTT support enables connection to IoT platforms for remote access and centralized monitoring capabilities.
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7. Waveshare 30-Ch Ethernet Relay Module – High Density Relay Module
Waveshare 30-Ch Ethernet Relay Module
30 Channels Relays
Modbus RTU TCP
PoE Power Supply
Industrial Grade Case
This large scale module provides thirty independent relay channels making it ideal for facilities requiring extensive control capabilities within a single device. The industrial grade protection circuits ensure reliability even when managing multiple loads simultaneously across various systems.
Pros
- High Channel Count
- Standard Modbus Support
- Robust Protection
- LED Indicators
- Rail Mount Design
Cons
- Higher Power Draw
- Large Physical Size
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The support for Modbus RTU and TCP protocols allows integration into broader industrial control networks where centralized management is required. Clear LED indicators for network status and relay states help operators quickly identify the status of individual channels or the device as a whole.
The high channel count necessitates careful consideration of power supply and physical space as the unit draws more power and occupies a larger cabinet footprint. Users should ensure their infrastructure can support the increased load and physical dimensions required for this model.
Ideal for factories and large smart home projects this module offers significant scaling potential. Its robust design and high channel density make it a powerful tool for managing complex automation tasks without needing multiple smaller devices.
Scalable Control
Thirty channels allow for significant expansion of automation capabilities without additional hardware overhead.
Industrial Robustness
Heavy duty protection circuits ensure stable operation even under demanding electrical and environmental conditions.
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8. Waveshare Industrial 8-Channel ESP32-S3 – Versatile Relay Module
Waveshare Industrial 8-Channel ESP32-S3
8 Channels Relays
WiFi Bluetooth Dual
Isolated RS485
Dual Core Processor
This module combines wireless flexibility with industrial ruggedness featuring a powerful dual core processor and isolated RS485 interface for sensor integration. The integrated Wi-Fi and Bluetooth allow for wireless configuration and control making it highly adaptable for modern smart environments.
Pros
- Dual Core Processor
- Wireless Connectivity
- Isolated RS485
- USB Type-C Debug
- Wide Voltage Input
Cons
- Configuration Complexity
- Advanced Feature Set
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A USB Type-C port facilitates easy debugging and firmware updates while the wide voltage input range ensures compatibility with diverse power sources. The robust isolation circuits protect the internal logic from electrical noise and high voltage surges ensuring long term reliability.
The rich feature set requires a good understanding of network configuration and microcontroller logic to fully utilize. Users should be prepared for a learning curve when setting up custom protocols or integrating with complex industrial systems.
Best suited for advanced hobbyists and engineers this module offers a high degree of control and connectivity. Its combination of wireless and industrial wired options makes it an excellent choice for projects requiring both remote access and local sensor integration.
Debugging Ease
USB Type-C support allows for straightforward firmware updates and real-time monitoring during development.
Isolated Interfaces
Isolated RS485 ensures safe connection to noisy industrial environments without risk to the controller logic.
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9. Waveshare 8-Ch Ethernet Relay Module (B) – Solid Relay Module
Waveshare 8-Ch Ethernet Relay Module (B)
8 Channels Relays
Digital Input Support
Modbus RTU TCP
PoE Power Supply
This variant adds digital input capabilities allowing for simple automation logic like triggering a relay based on a sensor signal directly on the device. The inclusion of linkage control and toggle modes simplifies setup for basic conditional switching without external programming.
Pros
- Digital Input Support
- Strong Isolation
- PoE Capability
- Linkage Control
- Rail Mount Design
Cons
- Mid Range Rating
- Limited Web UI
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Power options include both wide range DC input and PoE ensuring flexibility in installation environments. The industrial grade rail mount case protects the internal components while providing a secure mounting solution for standard control panels.
While the features are robust the basic nature of the configuration tools might require external software for advanced network settings. Users should verify that the digital input options match their specific sensor types for optimal compatibility.
Ideal for users needing simple local automation this module offers a practical balance of control and monitoring. Its linkage features make it a strong candidate for projects where sensor feedback directly controls relay states.
Local Automation
Digital inputs allow for immediate local triggering of relays without external server logic or control.
Linkage Logic
Toggle and linkage modes provide easy ways to implement simple conditional rules directly on the device.
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10. 8-CH Ethernet Relay Module – Standard Relay Module
8-CH Ethernet Relay Module
8 Channels Relays
Modbus RTU TCP
PoE Power Supply
Rail Mount Case
This model provides standard 8-channel Ethernet control with Modbus RTU and TCP protocol support ensuring broad compatibility. The inclusion of PoE power supply simplifies wiring in networked environments by allowing a single cable to provide both data and power.
Pros
- Standard Modbus Support
- PoE Capability
- Rail Mount Design
- Flash Function Support
- Optocoupler Isolation
Cons
- Mid Range Rating
- Basic Features
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The ABS rail-mount case ensures secure installation in distribution cabinets while the optocoupler isolation protects the device from electrical noise and interference. These features make it a practical choice for industrial settings requiring reliable networked control.
While functional the basic feature set may limit customization options for advanced users. Those requiring higher channel counts or more complex logic might find this model adequate for simple switching tasks but lacking for complex automation.
Ideal for basic industrial automation this module offers a reliable and straightforward solution for networked control. It serves as a dependable entry point for users needing essential switching capabilities without complex features or higher costs.
Simple Integration
Standard Modbus and PoE support make this unit easy to integrate into existing networked control systems.
Protective Design
Optocoupler isolation ensures safe operation even in environments with high electrical noise or surges.
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Buying Guide – How to Choose the Best Ethernet Relay Module
Selecting the right Ethernet Relay Module requires understanding your project requirements including protocol needs power constraints and channel count. This section outlines the key factors to consider to ensure compatibility and performance.
Protocol Support
Check whether the device supports Modbus RTU TCP or other protocols required by your existing control systems. Consistency in communication standards ensures smooth integration and avoids costly conversion hardware or software updates.
Prioritize devices with dual protocol support if you anticipate future upgrades or legacy system compatibility.
Channel Count
Determine the number of relays needed for your application. While eight channels cover many standard tasks thirty channel options are available for larger facilities or complex automation projects requiring extensive control.
Select a model that matches your current needs while leaving room for future expansion if possible.
Power Supply Options
Look for modules supporting PoE (Power over Ethernet) to simplify cabling in remote or hard to reach locations. Wide voltage input ranges ensure flexibility for environments with varying electrical standards or unreliable power sources.
PoE compliance is highly recommended for reducing clutter and installation costs in networked setups.
Isolation and Protection
Industrial grade devices should include optocoupler isolation and reverse-proof circuits to protect against electrical surges and short circuits. These features ensure longevity and safety particularly when switching high voltage or noisy loads.
Verify the contact rating and isolation specifications to match your load requirements accurately.
Wireless Connectivity
Some models include Wi-Fi and Bluetooth capabilities providing flexibility for setups where wired Ethernet is impractical. Wireless support enables easier mobile control and remote configuration without physical access to the device.
Choose wireless capable units if mobility and remote access are priorities for your project.
Digital Inputs
Modules with digital inputs allow for local automation logic such as triggering relays based on sensor signals. This reduces reliance on external controllers for simple conditional tasks and speeds up system response times.
Consider digital input features if you plan to integrate sensors or manual switches directly into the system.
Configuration Interface
Assess how the device is configured whether via web interface software tools or command line. Easy to use interfaces save time during setup and make troubleshooting simpler for non specialized technicians.
Devices offering web browser configuration provide greater accessibility without needing specialized software tools.
Physical Mounting
Ensure the device offers an industrial grade rail mount case for secure installation in control cabinets. Proper mounting protects against vibration and ensures a professional and organized setup that meets safety standards.
Rail mount cases are standard for industrial environments and make replacement or upgrades easier.
How to Use and Care for Your Ethernet Relay Module
Connect the Ethernet port to your local network and verify connectivity via the web interface or Modbus client. Ensure power is supplied either through the terminal block or PoE injector depending on your setup requirements.
Configure the device IP address and communication protocols using the provided software or browser interface. Set up digital inputs and relays according to your automation logic and test individual channels before full deployment.
Periodically check for firmware updates from the manufacturer to ensure security and performance improvements. Keep the device clean and free from dust especially in industrial settings to prevent overheating and ensure reliability.
Frequently Asked Questions
What is the primary advantage of an Ethernet Relay Module over WiFi models?
Ethernet modules generally offer more stable and consistent connectivity than WiFi models which can be prone to interference. They are ideal for industrial environments where reliability and uptime are critical and wired infrastructure is already available.
Can I use these modules with home automation platforms like Home Assistant?
Yes most modules supporting TCP Modbus or MQTT can be integrated with platforms like Home Assistant using custom integrations or MQTT brokers. This allows you to control relays from a central dashboard alongside other smart home devices.
What does Modbus RTU vs Modbus TCP mean for setup?
Modbus RTU is typically used for serial communication while Modbus TCP operates over Ethernet networks. Choose TCP if you are using a network infrastructure whereas RTU might be necessary for older systems using serial-to-Ethernet converters.
Is PoE power supply necessary for all installations?
PoE is not mandatory but highly beneficial in installations where running separate power cables is difficult or expensive. If you have existing power wiring near the device traditional DC power input may suffice.
How do I connect sensors to a module with digital inputs?
Connect passive dry contacts or active wet contacts to the digital input terminals according to the manual. Most devices support bi-directional isolation ensuring safety and reliable signal detection without affecting relay control.
Can I control multiple relays simultaneously with a single command?
Yes most industrial modules support group commands or batch operations to switch multiple relays at once. This is useful for synchronized operations like shutting down an entire production line during emergency stops.
Are these modules suitable for outdoor use?
Most modules are designed for indoor industrial cabinets. For outdoor use ensure you place them in a weatherproof enclosure and check that the operating temperature range suits your environment to avoid component failure.
What happens if the network connection is lost during operation?
The relays typically retain their last state during network outages unless configured with specific fail-safe settings. It is advisable to implement logic that returns to a safe state if the connection is interrupted for an extended period.
Final Thoughts on Choosing the Best Ethernet Relay Module
Choosing the right Ethernet Relay Module depends largely on your specific connectivity needs budget and complexity requirements. The top picks offer a mix of industrial reliability and modern features to suit diverse application scenarios.
Prioritize protocol compatibility and power options to ensure seamless integration with your existing systems. Consider future expansion needs when selecting channel count to avoid the need for frequent hardware upgrades.
Remember that prices and specifications may change so always verify current details on the product pages before purchasing. These devices provide robust networking solutions for both industrial automation and smart home projects.