SRD-24VDC-SL-C 2-Way 24V 10A 250VAC Relay Module User Manual

1. Introduction

This user manual provides comprehensive instructions for the AJSWISH SRD-24VDC-SL-C 2-Way 24V 10A 250VAC Relay Module. Please read this manual carefully before using the product to ensure proper operation and safety. This module is designed for various electronic control applications, offering reliable switching capabilities.

2. Product Overview

The SRD-24VDC-SL-C is a 2-channel relay module capable of handling 24V DC control signals and switching AC loads up to 250V at 10A, or DC loads up to 30V at 10A. It features two independent relays, each with Normally Open (NO), Common (COM), and Normally Closed (NC) contacts, providing flexibility for various circuit configurations. The module is designed for chassis mounting.

Figure 2.1: AJSWISH SRD-24VDC-SL-C 2-Way 24V 10A 250VAC Relay Module. This image shows the compact red PCB with two blue SRD-24VDC-SL-C relays, each connected to blue screw terminals for NO, COM, and NC contacts. A yellow jumper cap is visible on the input side, likely for high/low level trigger selection. The module is clearly labeled "2 Relay Module High/Low Level Trigger".

3. Features

Dual Channel Operation: Equipped with two independent relays for controlling two separate circuits.
High Current Capacity: Each relay can switch up to 10A at 250VAC or 10A at 30VDC.
Versatile Control Voltage: Operates with a 24V DC control signal.
Flexible Output Contacts: Each relay provides Normally Open (NO), Common (COM), and Normally Closed (NC) contacts.
Chassis Mount Design: Suitable for secure installation within enclosures or systems.
High/Low Level Trigger: Supports configurable trigger levels for input signals.

4. Specifications

Parameter	Value
Model Number	SRD-24VDC-SL-C
Control Voltage	24V DC
Max AC Load	10A @ 250VAC
Max DC Load	10A @ 30VDC
Contact Type	Normally Closed (NC), Normally Open (NO), Common (COM)
Contact Material	Aluminum
Mounting Type	Chassis Mount
Product Dimensions	3.15 x 1.18 x 0.79 inches (80 x 30 x 20 mm)
Manufacturer	GZEduld-US

5. Package Contents

1 x SRD-24VDC-SL-C 2-Way 24V 10A 250VAC Relay Module
1 x Piece of accessories (as specified by manufacturer)

6. Setup and Wiring

Before connecting the module, ensure all power sources are disconnected. Incorrect wiring can damage the module or connected devices.

6.1. Pinout Description

VCC: Power supply for the module (24V DC).
GND: Ground connection for the module.
IN1, IN2: Control signal inputs for Relay 1 and Relay 2 respectively. These inputs trigger the relays based on the configured high/low level.
NO (Normally Open): Contact that is open when the relay is de-energized and closes when energized.
COM (Common): Common contact for the relay switch.
NC (Normally Closed): Contact that is closed when the relay is de-energized and opens when energized.

6.2. Trigger Level Selection

The module supports both high-level and low-level trigger modes. This is typically configured via a jumper cap on the module (refer to Figure 2.1 for location).

High-Level Trigger: The relay activates when the input signal (IN1/IN2) is high (e.g., 24V).
Low-Level Trigger: The relay activates when the input signal (IN1/IN2) is low (e.g., 0V or GND).

Ensure the jumper setting matches your control circuit's logic.

6.3. Wiring Diagram (Conceptual)

Below is a conceptual wiring guide. Always refer to specific application requirements and safety standards.

Connect VCC to a stable 24V DC power supply positive terminal.
Connect GND to the negative terminal of the 24V DC power supply.
Connect your control signal source to IN1 and IN2. Ensure the trigger level (high/low) is correctly set.
For the load circuit:
- To switch a load ON when the relay is activated (Normally Open configuration): Connect one side of the load to the power source, and the other side of the load to the NO terminal. Connect the COM terminal to the return path of the power source.
- To switch a load OFF when the relay is activated (Normally Closed configuration): Connect one side of the load to the power source, and the other side of the load to the NC terminal. Connect the COM terminal to the return path of the power source.

Note: For AC loads, ensure proper insulation and safety precautions are taken. Consult a qualified electrician if unsure.

7. Operating Instructions

Once the module is correctly wired and powered, the relays can be controlled by applying the appropriate signal to the IN1 and IN2 pins.

Relay Activation: When the control signal (IN1 or IN2) matches the configured trigger level (high or low), the corresponding relay will energize. You may hear a click sound, and an indicator LED (if present) on the module will illuminate.
Contact State Change:
- When energized, the connection between COM and NO will close, and the connection between COM and NC will open.
- When de-energized, the connection between COM and NO will open, and the connection between COM and NC will close.
Deactivation: When the control signal is removed or changed to the opposite level, the relay will de-energize, returning its contacts to their default state.

Ensure that the load current and voltage do not exceed the module's specified maximum ratings to prevent damage.

8. Maintenance

The SRD-24VDC-SL-C Relay Module is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure longevity:

Keep Clean: Periodically inspect the module for dust or debris accumulation. Use a soft, dry brush or compressed air to clean.
Environmental Conditions: Operate the module within its specified temperature and humidity ranges. Avoid exposure to excessive moisture, corrosive gases, or extreme temperatures.
Secure Connections: Ensure all wiring connections are secure and free from corrosion. Loose connections can lead to intermittent operation or overheating.
Avoid Overloading: Do not exceed the maximum current and voltage ratings of the relays. Consistent overloading will significantly reduce the lifespan of the module.

9. Troubleshooting

If you encounter issues with your SRD-24VDC-SL-C Relay Module, consider the following common problems and solutions:

Problem	Possible Cause	Solution
Relay does not activate.	Incorrect power supply voltage. Incorrect trigger level setting (high/low). No control signal or incorrect signal. Faulty wiring.	Verify 24V DC power supply to VCC and GND. Check the jumper setting for high/low level trigger. Ensure the control signal is present and matches the trigger setting. Inspect all wiring for loose or incorrect connections.
Load does not switch ON/OFF.	Relay contacts not wired correctly (NO/NC/COM). Load current/voltage exceeds relay rating. Faulty load or power supply to load.	Review the wiring diagram for NO, NC, and COM connections. Ensure the load's specifications are within the relay's limits (10A, 250VAC/30VDC). Test the load and its power supply independently.
Module gets excessively hot.	Overloaded relay contacts. Short circuit in the load circuit. Incorrect power supply voltage.	Reduce the load current or use a higher-rated relay. Check the load circuit for any short circuits. Verify the input voltage is exactly 24V DC.

If the problem persists after attempting these solutions, please contact customer support.

10. Warranty and Support

AJSWISH is committed to providing high-quality products and customer satisfaction. This product comes with a standard manufacturer's warranty against defects in materials and workmanship.

For technical assistance, troubleshooting, or warranty inquiries, please do not hesitate to contact our support team. We are available 24/7 to assist you. Please feel free to contact us via email.

Thank you for choosing AJSWISH.

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AJSWISH SRD-24VDC-SL-C