AEDIKO 2 Channel 12V Relay Module Instruction Manual

1. Introduction

This instruction manual provides essential information for the proper installation, operation, and maintenance of the AEDIKO 2 Channel 12V Relay Module. Please read this manual thoroughly before using the product to ensure safe and efficient operation.

2. Product Overview

The AEDIKO 2 Channel 12V Relay Module is a control board designed to switch high-power loads using low-power signals. It features two independent relay channels with optocoupler isolation for enhanced reliability and protection of control circuitry. This module is compatible with various microcontrollers and supports both high and low-level trigger inputs.

Key Features:

• 2 Independent Channels: Allows control of two separate loads.
• 12V Operating Voltage: Designed for DC 12V power supplies.
• High Current Capacity: Normally open interfaces support AC 250V/10A and DC 30V/10A.
• Optocoupler Isolation: Provides electrical isolation between the control circuit and the load circuit, preventing interference.
• High/Low Level Trigger: Configurable trigger input for flexibility with different control signals.
• Fault-Tolerant Design: Ensures relays remain in a safe state even if control lines are interrupted.
• Easy Connection: Equipped with screwed terminal plates for direct wiring.

Figure 1: Top view of the AEDIKO 2 Channel 12V Relay Module, showing the two blue relays, terminal blocks, and control pins.

3. Setup and Connections

3.1 Module Components and Indicators

Figure 2: Component diagram of the relay module, highlighting Power Light, Output Indicator Lights (LED1, LED2), Relays (Relay-1, Relay-2), and High/Low Level Selection jumpers.

• Power Light (Green): Indicates the module is receiving power.
• Relay Status Indicators (Red, LED1, LED2): Light up when the corresponding relay is activated.
• Relays (Relay-1, Relay-2): Electromechanical switches for controlling loads.
• High/Low Level Selection Jumpers: Configures the trigger sensitivity for each channel.

3.2 Input Interface Connections

Connect the control signals and power supply to the input terminal block as follows:

Figure 3: Input interface connections, showing DC+, DC-, IN1, and IN2 terminals.

• DC+: Connect to the positive terminal of a DC 12V power supply.
• DC-: Connect to the negative terminal of the DC 12V power supply.
• IN1: Signal input for Channel 1. This terminal triggers Relay 1.
• IN2: Signal input for Channel 2. This terminal triggers Relay 2.

3.3 Output Interface Connections

Connect the load to be controlled to the output terminal blocks. Each relay provides Normally Open (NO), Common (COM), and Normally Closed (NC) contacts.

Figure 4: Output interface connections, showing NO1, COM1, NC1 for Channel 1 and NO2, COM2, NC2 for Channel 2.

• NO1 (Normally Open 1): This contact is open when Relay 1 is de-energized and closes when Relay 1 is energized.
• COM1 (Common 1): The common terminal for Relay 1. Connect one side of your load here.
• NC1 (Normally Closed 1): This contact is closed when Relay 1 is de-energized and opens when Relay 1 is energized.
• NO2 (Normally Open 2): This contact is open when Relay 2 is de-energized and closes when Relay 2 is energized.
• COM2 (Common 2): The common terminal for Relay 2. Connect one side of your load here.
• NC2 (Normally Closed 2): This contact is closed when Relay 2 is de-energized and opens when Relay 2 is energized.

Wiring Example: To switch a load ON when the relay is triggered, connect one side of the load to COM and the other side to NO. To switch a load OFF when the relay is triggered, connect one side of the load to COM and the other side to NC.

3.4 High/Low Level Trigger Configuration

The module supports both high and low-level trigger inputs. This is configured using jumpers located near the IN1 and IN2 pins.

• Low Level Trigger: Place the jumper to short the 'L' pin with the 'S' pin (signal pin). The relay will activate when the input signal (IN1 or IN2) is low (e.g., 0V).
• High Level Trigger: Place the jumper to short the 'H' pin with the 'S' pin (signal pin). The relay will activate when the input signal (IN1 or IN2) is high (e.g., 3.3V or 5V, depending on your microcontroller's logic level).

Ensure the trigger level setting matches the output logic level of your controlling device (e.g., microcontroller).

4. Operating Instructions

1. Power On: Connect a stable DC 12V power supply to the DC+ and DC- terminals. The green power indicator light will illuminate.
2. Connect Control Signal: Connect your microcontroller or control device's output pin to IN1 or IN2, ensuring the trigger level (high or low) is correctly configured with the jumpers.
3. Connect Load: Wire your load to the appropriate NO/COM or NC/COM terminals for each channel.
4. Trigger Relay:
   • If configured for Low Level Trigger, applying a low signal (e.g., GND) to IN1 or IN2 will activate the corresponding relay. The red status indicator for that channel will light up.
   • If configured for High Level Trigger, applying a high signal (e.g., 3.3V or 5V) to IN1 or IN2 will activate the corresponding relay. The red status indicator for that channel will light up.
5. Deactivate Relay: To deactivate the relay, remove the trigger signal (apply high for low-level trigger, or low for high-level trigger). The red status indicator will turn off.

Always ensure that the current and voltage ratings of your load do not exceed the maximum ratings of the relay module (AC 250V/10A, DC 30V/10A).

5. Maintenance

The AEDIKO 2 Channel 12V Relay Module is designed for reliable operation with minimal maintenance. Follow these guidelines:

• Keep Clean: Ensure the module is free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning if necessary.
• Inspect Connections: Periodically check all terminal connections to ensure they are secure and free from corrosion.
• Environmental Conditions: Operate the module within its specified temperature and humidity ranges to prevent damage.
• Avoid Overload: Do not exceed the maximum current and voltage ratings of the relays to prolong their lifespan.

6. Troubleshooting

If you encounter issues with your relay module, consider the following troubleshooting steps:

• Module Not Powering On:
  • Verify that the DC 12V power supply is correctly connected to DC+ and DC-.
  • Check if the power supply is providing the correct voltage (12V DC) and sufficient current.
  • Ensure the power supply is functional.
• Relay Not Activating:
  • Confirm that the power indicator (green LED) is on.
  • Check the High/Low Level Trigger jumper settings. Ensure they match your control signal's logic level.
  • Verify that the control signal is correctly applied to IN1 or IN2 and is at the expected voltage level (high or low).
  • Test the control signal source (e.g., microcontroller pin) to ensure it is functioning correctly.
• Load Not Switching:
  • Ensure the relay status indicator (red LED) lights up when the relay should be active. If not, refer to "Relay Not Activating" above.
  • Check the wiring between the relay output terminals (NO/COM/NC) and your load.
  • Verify that the load itself is functional and not drawing excessive current that could damage the relay contacts.
  • Confirm that the load's voltage and current requirements are within the relay's specifications.

7. Specifications

Figure 5: Physical dimensions of the relay module, showing approximate length and width.

8. Important Safety Information

• Always disconnect power before making any connections or modifications to the module.
• Ensure all wiring is correct and secure to prevent short circuits or electrical hazards.
• Do not exceed the specified voltage and current ratings for the module and relays.
• This module is intended for use by individuals with appropriate electrical knowledge. If unsure, consult a qualified professional.
• Keep the module away from water, excessive heat, and flammable materials.