2 Channel 5V Relay Module Board With Optocoupler Isolation

Product Description

The 2 Channel 5V Relay Module Board With Optocoupler Isolation is a compact and reliable switching solution designed for controlling high-voltage AC and DC devices using low-voltage microcontrollers. It is widely used in Arduino projects, ESP32 systems, ESP8266 NodeMCU applications, Raspberry Pi setups, and industrial automation systems.

This relay module allows safe and efficient control of two independent electrical loads. It is ideal for smart home automation, robotics, agriculture systems, and IoT-based remote control applications where multiple devices need to be switched using digital signals.

The 2 Channel 5V Relay Module Board With Optocoupler Isolation ensures safe operation by separating the control circuit from the high-voltage load circuit. This protection helps prevent damage to sensitive microcontrollers caused by voltage spikes, electrical noise, and back-EMF from inductive loads like motors and solenoids.

How It Works

The 2 Channel 5V Relay Module Board With Optocoupler Isolation works by receiving a low-voltage signal from a microcontroller such as Arduino or ESP32. When a digital signal is applied to the input pins, the onboard optocoupler activates the relay coil.

The optocoupler provides electrical isolation by transferring signals using light instead of direct electrical connection. This ensures complete protection of the control system from high-voltage fluctuations. Once activated, the relay switches the connected device ON or OFF depending on the circuit configuration (NO or NC).

This module works with Arduino, ESP32, and other microcontrollers.

Arduino reference guide:
👉 https://www.arduino.cc/reference/en/

This simple yet powerful mechanism makes the module highly reliable for automation systems.

Key Features

The 2 Channel 5V Relay Module Board With Optocoupler Isolation offers several important features that make it suitable for professional and hobby electronics projects:

• Dual independent relay channels for controlling two devices
• Optocoupler isolation for enhanced electrical safety
• Supports both AC and DC load switching
• High switching capacity up to 250V AC 10A or 30V DC 10A
• LED indicators for real-time status monitoring
• Low trigger current for easy microcontroller interfacing
• Compatible with Arduino, ESP32, ESP8266, and Raspberry Pi
• Screw terminal connectors for secure wiring
• Stable performance for continuous operation

Pin Configuration

Control Side:

• VCC: 5V power supply
• GND: Ground
• IN1: Channel 1 input
• IN2: Channel 2 input

Output Side:

• COM: Common terminal
• NO: Normally open terminal
• NC: Normally closed terminal

Applications

The 2 Channel 5V Relay Module Board With Optocoupler Isolation is widely used in various automation and control systems:

• Smart home automation systems
• IoT-based remote control projects
• Robotics and motor control systems
• Industrial automation equipment
• Agricultural irrigation systems
• Lighting and appliance control
• Security and alarm systems
• DIY electronics projects

Technical Specifications