The Modbus-RTU Relay Module (1/2/4/8 Channels, 12V/24V) is a high-performance switching and control solution designed for industrial automation, smart home systems, and embedded applications. Built with RS485 and TTL communication interfaces, this module ensures reliable data transfer, seamless integration with PLCs, microcontrollers, and IoT systems.

Featuring optocoupler isolation, the module provides strong protection against voltage spikes, signal interference, and system overloads—ensuring long-lasting stability and safety in demanding environments. Its flexible channel options (1, 2, 4, or 8) make it suitable for both small-scale and large-scale projects, while supporting a wide input voltage range (12V/24V).

Key Features

• Multi-Channel Options: Available in 1/2/4/8 channel configurations for versatile applications.

• Wide Voltage Support: Compatible with both 12V and 24V DC systems.

• RS485 & TTL Communication: Enables seamless Modbus-RTU protocol integration with industrial controllers and embedded systems.

• Optocoupler Isolation: Protects circuits from noise, surges, and electrical interference.

• High Reliability: Stable switching performance with long service life.

• Flexible Applications: Ideal for industrial automation, smart home control, IoT devices, and laboratory testing.

• Easy Integration: Simple wiring and user-friendly design for quick setup.

Technical Specifications

• Model Type: Modbus-RTU Relay Module

• Channels: 1 / 2 / 4 / 8 (selectable)

• Operating Voltage: 12V DC / 24V DC

• Communication Protocol: Modbus-RTU

• Interfaces: RS485, TTL

• Isolation: Optocoupler isolation for input/output protection

• Relay Type: High-quality mechanical relays for stable switching

• Applications: Industrial automation, smart control systems, IoT integration, home automation, testing equipment

This Modbus-RTU relay module offers fast response, stable communication, and robust circuit protection, making it the perfect choice for engineers, automation professionals, and hobbyists. Its multi-channel flexibility allows you to scale projects easily, while the durable design ensures long-term reliability in critical environments.