DIN Rail 4-Channel RS485 Relay Module – Modbus RTU Protocol

4-Channel DIN Rail RS485 Relay Module with Modbus RTU Protocol

Take your industrial automation and control projects to the next level with this robust 4-Channel RS485 High-Current Relay Module. Designed for demanding environments, this module leverages the Modbus RTU communication protocol over an RS485 interface, delivering fast, stable, and reliable operation across a wide range of industrial control applications.

Key Features

• 4 Independent High-Current Relay Channels — Control multiple circuits simultaneously with ease
• Modbus RTU Protocol via RS485 Interface — Industry-standard communication for seamless integration with PLCs, SCADA systems, and automation controllers
• Built-in Power Isolation — Separates control and power circuits to protect sensitive equipment
• ADI Magnetic Coupling Isolation — Advanced isolation technology for superior noise immunity and signal integrity
• Self-Recovery Fuse & TVS Protection Circuits — Multiple layers of protection guard against overcurrent, surges, and transient voltage spikes
• DIN Rail ABS Housing — Standard DIN rail mount for quick, tool-friendly installation in control panels and enclosures
• Fast Communication Speed — Reduces latency for time-sensitive control tasks
• Easy to Operate — Straightforward setup and configuration; compatible with a variety of industrial control systems

Specifications

What's in the Box

• 1 × 4-Channel RS485 Relay Module

Note: Due to different display settings and lighting conditions, the actual product color may vary slightly from images shown. Measurement tolerance: ±1–3 cm. Product specifications may be updated between batches; minor visual differences do not affect performance.

Ideal For

• Industrial automation and PLC control panels
• Building management systems (BMS)
• Smart factory and IoT control applications
• Data acquisition and SCADA integration
• Any application requiring high-speed, reliable RS485 relay switching

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Frequently Asked Questions

Q: What communication protocol does this 4-channel relay module support?

A: This relay module supports the Modbus RTU protocol over an RS485 interface, making it fully compatible with the vast majority of PLCs, HMIs, SCADA systems, and other industrial automation controllers that use this industry-standard communication standard.

Q: What protection features are built into this RS485 relay module?

A: The module includes multiple layers of protection: built-in power isolation, ADI magnetic coupling isolation, a self-recovery fuse, and TVS (Transient Voltage Suppressor) circuits. Together, these safeguard both the module and connected equipment from electrical noise, overcurrent events, and voltage transients common in industrial environments.

Q: How is this relay module mounted?

A: The module features a standard DIN rail ABS housing, allowing it to snap directly onto any standard DIN rail inside a control panel or enclosure — no special tools or brackets required for installation.

Q: Is this module suitable for high-current applications?

A: Yes. This is specifically designed as a high-current relay module, making it well-suited for switching high-load circuits in industrial machinery, building systems, and other demanding control applications.

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.