2 Channel Relay Module without light coupling 5V

Description

Product Overview

The 2 Channel Relay Module without Optocoupler is a simple, cost-effective switching solution designed to control two independent high-power AC or DC loads directly from a 5V logic system. Unlike more complex relay modules that incorporate optocoupler isolation, this module uses a direct transistor driver circuit (typically NPN transistors such as 2N2222, BC547, or S8050) to activate each relay coil . This design offers a lower cost and simpler circuit, making it ideal for hobbyist projects, educational use, and applications where isolation is not critical.

This dual-channel module allows you to control two separate devices independently from your microcontroller. With each relay rated for 10A at 250V AC or 10A at 30V DC, it can handle lights, fans, motors, pumps, solenoids, and other household or industrial appliances . Onboard status LEDs provide visual confirmation when each relay is activated, simplifying operation monitoring and troubleshooting.

Designed with a low-level trigger, the relays activate when the control pins are pulled LOW (0V) and deactivate when pulled HIGH (5V) . This active-LOW behavior provides a degree of safety—the relays remain off during power-up or if the control signal is lost, preventing accidental activation of connected devices.

Important Note: This module does not include optocoupler isolation. The control circuit and the high-voltage load share a common ground path . Exercise caution when wiring high-voltage loads and ensure proper insulation and clearance for safety .

Key Features

• Dual Independent Channels: Two separate relay channels allow independent control of two different loads from a single module .

• Low-Level Trigger (Active LOW): Each relay activates when its corresponding IN pin is pulled LOW (0V) and deactivates when HIGH (5V). This ensures the relays remain off during power-up .

• Direct Transistor Drive: Uses simple NPN transistors (such as 2N2222, BC547, or S8050) to drive each relay coil, eliminating the need for optocoupler components .

• 10A High Switching Capacity: Each relay contacts rated for 10A at 250V AC or 10A at 30V DC, suitable for controlling lights, fans, motors, pumps, and industrial equipment .

• SPDT Contact Configuration: Each channel provides Common (COM), Normally Open (NO), and Normally Closed (NC) terminals for maximum wiring flexibility—use NO for OFF-by-default operation or NC for ON-by-default operation .

• Status Indicator LEDs: Onboard LEDs for each channel illuminate when the corresponding relay is activated (IN pin LOW), providing clear visual feedback .

• 5V Logic Compatibility: Designed for 5V microcontrollers like Arduino, STM32, and 5V logic systems, with a control signal range of 0V–5V .

• Compact and Lightweight: Small PCB footprint with mounting holes for easy integration into breadboards, enclosures, or control panels .

• Simple 5-Pin Control Interface: Standard 2.54mm pitch header (VCC, GND, IN1, IN2) allows direct connection to microcontrollers, sensors, or manual switches .

Technical Specifications