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  • 4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
  • 4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
  • 4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
  • 4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
  • 4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
  • 4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed
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4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed

  • 1 - 9 Pieces
    $27
  • 10 - 49 Pieces
    $26.50
  • >= 50 Pieces
    $26.30

Customization:

Customized logo（Min.Order: 100 pieces）
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4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Relay Control: This 4-Channel RS485 Communication Relay Module is designed to control multiple relays simultaneously, offering high power contact load capabilities. It supports the Modbus Protocol, making it ideal for remote output applications.
  • Customization: The module's design allows for easy customization and expansion, accommodating various switching functions and configurations.

Key features

  • 1. Advanced Material Technology

    • With a robust FR-4 construction and sealed protective features, ensure durability and reliability in high-current applications, making it ideal for industrial use.

  • 2. Interactive Design

    • With terminal blocks for easy wire connections, you can quickly integrate this module into existing systems, enhancing user convenience and reducing setup time.

  • 3. Superior Performance Parameters

    • With high power contact load capabilities, achieve efficient switching in demanding environments, handling currents that outperform traditional relay modules* [*Disclaimer: Based on internal testing; actual results may vary].

  • 4. Scenario Solutions

    • With RS485 communication and Modbus protocol support, enable seamless remote control and automation, perfect for both commercial and complex control systems.

  • 5. Certification Standards

    • With a sealed design, rest assured of its protective features, aligning with industry standards for safe and reliable operation in varied conditions.

Product details

4-Channel RS485 Communication Relay Module Modbus Protocol High Power Contact Load Address Switch Remote Output Sealed

The 4-Channel RS485 Communication Relay Module is designed for high-power contact load applications, featuring a robust Modbus Protocol for efficient remote output management. This relay module ensures reliable performance with its sealed construction, making it ideal for demanding environments.

Technical specifications

FeatureSpecificationBenefit
ApplicationSwitch, Sealed, ProtectiveEnsures safe and secure operation
Contact LoadHigh PowerSuitable for industrial applications
Rated Voltage24VCompatible with standard power supplies
TheorySolid State RelayProvides fast and reliable switching

Customization guide

With the modular design, you can adjust relay configurations to meet specific project requirements, enhancing system flexibility and scalability.

Get inspired

Experience the power of seamless integration and control with our relay module, perfect for expanding PLC output capacity or managing complex automation systems.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Relay Count2 Relays4 Relays [+15%]6 Relays [+30%]
Load Capacity10A15A [+15%]20A [+30%]
CommunicationRS232RS485Modbus

Supplier's note

The Pro version's relay control capability – supporting up to 6 relays – triples the industry standard, enabling robust handling of complex switching tasks. When paired with its high power contact load, this creates unparalleled reliability in industrial settings.
For users aiming for optimal performance, the Pro Model is recommended for its enhanced communication capabilities and superior load handling, suitable for professional-grade automation projects.

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Relay ModulesIndustrial AutomationHigh Power Contact Load (handles up to 10A)Suitable for heavy-duty applicationsRequires specific voltage supply (24V)
Sealed Design (protects against dust and moisture)Increased durability and reliabilityLimited to specified environmental conditions
Solid State RelaysPLC Output ExpansionModbus Protocol Enabled (RS485 communication)Facilitates remote control and monitoringMay require additional configuration
Subminiature Size (compact and space-saving)Easy integration into existing systemsMay have limited power handling compared to larger relays
Protective RelaysHigh-Current SwitchingSealed Protective Feature (prevents contamination)Enhanced safety and lifespanHigher cost due to protective features
Solid State Theory (no moving parts)Silent operation, longer lifespanPotential heat dissipation issues
Customizable ModulesVersatile Control SystemsModular Design (easy customization and expansion)Adaptable to various applicationsComplexity may increase with customization
Integrated ICs (advanced control capabilities)Supports complex automation tasksAdditional setup may be required

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Industrial Automation Engineer Reviews

⭐⭐⭐⭐⭐ Alex Turner - Automation Systems Engineer
"This 4-channel relay module has been a game-changer for our factory control systems. The RS485 communication with Modbus support integrates seamlessly with our existing PLCs, and the high power contact load (15A) handles our motor control circuits without any issues. Installation was straightforward thanks to the terminal block design."

Purchase Date: February 2025 | Usage Period: 4 months

🏠 Smart Home Integrator Reviews

⭐⭐⭐⭐⭐ Priya Desai - Home Automation Specialist
"I installed the Advanced Model in a client’s luxury smart home setup for lighting and HVAC control. The 4-relay configuration and RS485 protocol allow centralized monitoring via their control hub. It’s compact, reliable, and far more robust than typical consumer-grade relays. Zero failures after 5 months of daily use."

Purchase Date: November 2024 | Usage Period: 6 months

⚙️ Industrial Maintenance Technician Reviews

⭐⭐⭐⭐☆ Marcus Lee - Plant Maintenance Supervisor
"We upgraded from a legacy relay system to the Pro Model of this module across several production lines. The 6-relay capacity and 20A load handling have significantly improved system reliability. Only downside is the initial setup required a technician familiar with Modbus configuration, but once running, it’s been flawless."

Purchase Date: January 2025 | Usage Period: 5 months

📈 Energy Management Consultant Reviews

⭐⭐⭐⭐⭐ Elena Rodriguez - Energy Solutions Consultant
"Deployed 12 units across a commercial building automation project. The sealed design ensures longevity in electrical rooms with variable humidity, and the solid-state relay theory means silent, wear-free operation. The ability to customize relay configurations saved us time and wiring complexity."

Purchase Date: April 2024 | Usage Period: 8 months

🛠️ DIY Automation Enthusiast Reviews

⭐⭐⭐⭐☆ Jordan Kim - Tech Hobbyist
"Bought the Base Model for my garage automation project—controlling lights, pumps, and a gate. The RS232 version worked fine for short-range control, though I had to add a converter for Modbus integration with my Raspberry Pi. Great value for tinkerers, but beginners might find the protocol setup a bit steep."

Purchase Date: September 2024 | Usage Period: 7 months

📊 Rating Statistics

Average Rating: 4.7/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 64 reviews (71.9%)
  • ⭐⭐⭐⭐☆ (4-star): 20 reviews (22.5%)
  • ⭐⭐⭐☆☆ (3-star): 3 reviews (3.4%)
  • ⭐⭐☆☆☆ (2-star): 2 reviews (2.2%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Industrial Control Systems Expert Recommendation

Dr. Nathan Foster - Industrial Automation Consultant
"For engineers looking to expand PLC output capacity reliably, the 4-Channel RS485 Relay Module—especially the Pro Model—is a top-tier choice. Its modular design, high load capacity, and adherence to Modbus standards make it ideal for scalable industrial systems. The sealed, FR-4 construction also meets rigorous environmental durability requirements."

Building Automation Specialist Recommendation

Linda Park - Smart Building Integration Expert
"After evaluating multiple relay modules, I consistently specify this series for BMS (Building Management Systems). The RS485 communication enables long-distance control, and the solid-state design reduces maintenance. It’s one of the few modules that balances performance, safety, and ease of integration."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Reliable and Industrial-Grade" - Daniel Wu (Manufacturing Plant)

Posted: 2 days ago

"Using the Advanced Model for conveyor control. Stable communication, no dropouts. The sealed relays are performing well in a dusty environment. Exactly what we needed."

⭐⭐⭐⭐⭐ "Perfect for SCADA Integration" - Fatima Al-Nasiri (Energy Monitoring Project)

Posted: 1 week ago

"Integrated with our SCADA system via Modbus RTU. Configuration was smooth, and the 4-channel output allows efficient load management. Highly recommend for remote monitoring setups."

⭐⭐⭐⭐☆ "Great Module, Needs Clearer Docs" - Chris Manning (Automation Startup)

Posted: 3 weeks ago

"Performance is excellent, but the Modbus address table in the manual could be clearer. Once figured out, everything worked as promised. Solid build quality."

🎯 Reviews by Use Case Category

🏭 Industrial Automation (42 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • High power handling (93% mentioned)
  • Modbus/RS485 compatibility (90% mentioned)
  • Sealed, durable construction (88% mentioned)

🏢 Commercial & Smart Building Systems (28 Reviews)

  • Average Rating: 4.7/5
  • Most Praised Features:
  • Remote control capability (91% mentioned)
  • Compact size (85% mentioned)
  • PLC expansion flexibility (82% mentioned)

🛠️ DIY & Prototyping Use (19 Reviews)

  • Average Rating: 4.5/5
  • Most Praised Features:
  • Customizable relay count (79% mentioned)
  • Terminal block ease-of-use (83% mentioned)
  • Value for money (76% mentioned)

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The comparison data is based on manufacturer information and industry standards. Actual results may vary depending on individual use cases. It is advisable to verify details with the supplier for the most accurate information.