12V Self-Locking Interlock 2-in-1 2 Channel Relay Module

2 Channel Relay Module with Button and Multi-Level Triggering is a versatile switching solution that empowers hobbyists and industrial engineers to manage high-voltage or high-current loads safely using low-voltage control signals. This module integrates two independent relays, on-board push buttons, and LED indicators, which consequently allows for immediate manual control and clear status feedback without needing an external microcontroller. The module offers flexible trigger modes, including self-locking (toggle), interlock, and high/low-level triggering, which makes it adaptable to almost any switching requirement. Furthermore, its robust design ensures reliable electrical isolation between the control circuit and the load, making it an indispensable component for automation projects, appliance control, and motor reversal circuits. Therefore, you can use this compact unit to simplify complex wiring and reduce component count in both prototyping and final product deployment.

Key Features:

• Dual Channel Control: Provides two independent relay channels, enabling the simultaneous or sequential control of two separate loads.
• Flexible Trigger Modes: Supports Self-Locking (toggle), Interlock, and Momentary operational modes, easily selectable via jumper settings.
• On-Board Push Buttons: Includes two integrated switches for manual control and immediate testing without requiring external input signals.
• High/Low Level Trigger: Allows the user to select High (VCC) or Low (GND) trigger activation using a jumper cap, ensuring compatibility with various microcontrollers (e.g., Arduino, PIC).
• Status Indicators: Dedicated LED indicators clearly display the power status and the on/off state of each relay.
• Optocoupler Isolation: Uses optocouplers to provide crucial electrical isolation between the low-voltage control signal and the high-power relay coil.

Technical Specifications:

• Operating Voltage (V_CC): Typically 5V DC or 12V DC (Specify voltage when ordering)
• Relay Contact Rating: Maximum 10A at 250V AC or 10A at 30V DC
• Trigger Current: Typically 5 mA to 15 mA (Depending on trigger voltage)
• Trigger Modes: Self-Locking, Interlock, Momentary (Jumper Selectable)
• Relay Type: SRD-05VDC-SL-C or similar (Single-Pole Double-Throw, SPDT)
• Insulation Resistance: ≥ 100 MΩ (at 500 VDC)

Mechanical Specifications:

• Module Style: PCB Assembly with Screw Terminals
• Mounting: Fixed screw holes for easy installation into enclosures or chassis.
• Connections: High-quality screw terminal blocks for secure load wiring.
• Durability: Mechanical life of relay ≥ 10,000,000 operations.

Dimensions:

• Body Length: ≈ 47 mm
• Body Width: ≈ 49 mm
• Body Height (including relay): ≈ 19 mm
• Weight: ≈ 35 g

Pinout and Wiring:

• VCC: Connect to the module’s positive power supply (e.g., 5V or 12V DC).
• GND: Connect to the ground (0V) of the power supply and control signal.
• IN1 / IN2: These are the low-voltage control signal inputs for Relay 1 and Relay 2. Trigger with High or Low level based on jumper selection.
• COM (Common): This is the central pole of the relay contact, typically connected to the power source of the load.
• NO (Normally Open): The contact that connects to COM when the relay is activated (closed).
• NC (Normally Closed): The contact that connects to COM when the relay is deactivated (open).

Datasheet Reference:

• Download SRD-05VDC-SL-C Relay Datasheet Reference

Commonly Used in:

• DIY Home Automation: Controlling AC lighting, fans, or garage doors.
• Robotics and Industrial Control: Switching high-current solenoids or motor starters.
• Safety and Interlock Systems: Creating systems where one relay must be off before the other can activate (using Interlock mode).

Applications:

• Motor Direction Control: Using the Interlock mode to prevent short circuits when reversing AC or DC motors.
• Appliance Power Control: Providing isolated on/off switching for water pumps, heaters, or appliances.
• Signal Level Conversion: Safely bridging the gap between low-voltage microcontrollers and high-voltage power circuits.

Equivalent Models:

• Opto-isolated 2 Channel Relay Module: Many manufacturers offer functionally identical modules, often varying only in relay brand or component layout.
• KY-019 5V Relay Module (Single Channel): A smaller, single-channel relative that uses the same basic isolation principle.
• JQC-3F/SRD 12V Relay Boards: Equivalent boards utilizing the 12V relay coil version for higher voltage control applications.

Package Includes:

• 1 x 2 Channel Relay Module with Button and Multi-Level Triggering