24V 2-way electromagnetic relay module low level trigger without optocoupler with light

Description

Product Overview

The 24V 2-Way Electromagnetic Relay Module is a simple, cost-effective switching solution designed to control two independent high-power AC or DC loads directly from a 24V logic or industrial control 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 PLC automation systems, industrial control panels, building management systems, and projects where isolation is not critical.

This dual-channel module allows you to control two separate devices independently from your 24V controller. With each relay rated for 10A at 250V AC or 10A at 30V DC, it can handle lights, fans, motors, pumps, solenoids, and other industrial equipment . 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 (24V) . 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 (24V). This ensures the relays remain off during power-up .

• Direct Transistor Drive: Uses simple NPN transistors 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 motors, pumps, lights, 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 .

• 24V Logic Compatibility: Designed for 24V PLC automation, industrial controllers, and building management systems, with a control signal range of 0V–24V .

• Fault-Tolerant Design: Even if the control line is disconnected or broken, the relay will not operate unintentionally, ensuring fail-safe behavior .

• Compact and Mountable: Small PCB footprint with mounting holes for easy integration into control cabinets, DIN rails, or enclosures .

Technical Specifications