8-Channel RS485 Relay Module Modbus RTU 30A High Current

8-Channel RS485 Ethernet Relay Module with Modbus RTU Protocol — 30A High Current

Take full control of your industrial automation setup with this robust 8-channel RS485 relay module. Designed for demanding environments, this module supports the widely-used Modbus RTU protocol and is engineered for fast, stable, and reliable communication across a variety of industrial control applications.

Key Features

• 8-Way High-Current Relay Control: Each channel supports up to 30A, making it suitable for switching heavy loads in industrial or commercial installations.
• RS485 Industrial Interface: Industry-standard RS485 communication ensures long-distance, noise-immune data transmission in electrically challenging environments.
• Modbus RTU Protocol: Seamlessly integrates with PLCs, SCADA systems, HMIs, and other Modbus-compatible controllers right out of the box.
• Multi-Layer Isolation: Features built-in power isolation and ADI magnetic coupling isolation to protect both the module and connected equipment from electrical interference and surges.
• Self-Recovery Fuse & TVS Protection: Onboard self-recovery fuse and transient voltage suppressor (TVS) circuits provide an additional layer of overcurrent and overvoltage safeguarding.
• DIN Rail ABS Housing: The sturdy ABS rail housing design allows easy mounting on standard DIN rails for organized panel installations.
• Simple Operation: Straightforward setup and configuration — minimal wiring and programming effort required to get up and running.

Specifications

What's in the Box?

• 1 × 8-Channel RS485 Relay Module

Note: Only the above item is included. Other products shown are for illustrative purposes only. Due to different production batches, minor differences in product appearance or printed text may occur — this does not affect functionality. Slight color differences may occur due to monitor settings. Measurement tolerance: ±1–3 cm.

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Frequently Asked Questions

Q: What communication protocol does this RS485 relay module use?

A: This 8-channel relay module uses the Modbus RTU protocol over an RS485 interface, making it directly compatible with PLCs, SCADA systems, HMIs, and virtually any Modbus RTU-capable master device used in industrial automation.

Q: What is the maximum current each relay channel can handle?

A: Each of the 8 relay channels is rated for up to 30 amps, allowing you to switch high-current loads suitable for heavy-duty industrial and commercial control applications.

Q: How is the module protected against electrical interference and surges?

A: The module features multiple protection layers: built-in power isolation, ADI magnetic coupling isolation, a self-recovery fuse, and TVS (transient voltage suppressor) circuits — all working together to shield the module and connected equipment from electrical noise, overcurrent, and voltage spikes.

Q: Can this module be mounted on a DIN rail?

A: Yes. The module comes in an ABS DIN rail housing, allowing straightforward mounting on standard DIN rails for clean, organized panel installations.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.