Safely Control High-Power Loads with Your 24V System

This 24V relay module, available in 2 or 4-channel options, is the perfect bridge between your low-voltage control circuits (like a PLC, MCU, or industrial controller) and high-power AC/DC loads. It allows you to use a safe, low-voltage 24V signal to control lights, motors, solenoids, and other demanding devices.

Key Features

• 24V DC Operation: Designed specifically for 24V systems, making it ideal for PLC and industrial automation projects.
• Selectable High/Low Level Trigger: Easily configure how your relay activates. Use the onboard jumpers (S1, S2, etc.) to choose whether a HIGH (24V) or LOW (0V) signal turns the relay ON.
• Optocoupler Isolation: Features built-in optocouplers (opto-isolators) that completely separate your control circuit (PLC/MCU) from the high-power load. This protects your delicate electronics from voltage spikes and electrical noise.
• High Switching Capacity: Each relay (SRD-24VDC-SL-C) is rated to handle heavy loads:
  • 10A @ 250VAC
  • 10A @ 30VDC
• Clear Status Indicators: Equipped with a power-on LED and individual status LEDs for each relay. Instantly see which channels are active, making troubleshooting a breeze.
• Secure & Easy Wiring: All inputs and outputs use convenient screw terminals for reliable, secure connections. No soldering required.

How to Use

• Power: Connect your 24V power supply to DC+ and DC-.
• Trigger Setup:
  • Move the S1/S2/etc. jumper to the High side for a high-level trigger.
  • Move the jumper to the Low side for a low-level trigger.
  • Connect the Com (common trigger) pin to your logic's common ground (0V) or positive (24V) as required by your setup.
• Input Signal: Send your 24V control signal from your PLC or MCU to the IN1, IN2, IN3, or IN4 pins.
• Load Wiring: Wire your device (e.g., a light or motor) using the three output terminals for each channel:
  • NC (Normally Closed): Contact is closed when the relay is OFF.
  • COM (Common): The central pin your load is wired through.
  • NO (Normally Open): Contact is open when the relay is OFF (closes when activated).

Specifications

• Variants: 2-Channel, 4-Channel
• Coil Voltage: 24V DC
• Trigger Type: High / Low Level (Jumper Selectable)
• Relay Model: SRD-24VDC-SL-C
• Max Load: 10A 250VAC / 10A 30VDC
• Isolation: Optocoupler
• Input Terminals: DC+, DC-, IN1, IN2 (IN3, IN4 for 4-ch)
• Output Terminals (per channel): NC, COM, NO