Shopping Cart

A 12V 8-Channel Relay Module is an advanced version of relay modules designed to control multiple high-power devices or systems with a single low-voltage control signal. This module is commonly used in automation, home control systems, and industrial applications due to its ability to handle multiple channels simultaneously.

Key Features:

1. Number of Channels:

   • 8 Channels: Allows for control of up to eight independent devices or systems.

2. Operating Voltage:

   • 12V DC: The relay module operates from a 12V power supply, which powers the relay coils.

3. Relay Type:

   • Electromechanical Relays: Uses electromechanical relays to switch high-voltage AC or DC loads.

4. Relay Ratings:

   • AC Load: Typically rated for 250V AC at 10A.
   • DC Load: Typically rated for 30V DC at 10A.
   • Note: Always verify the specific ratings from the relay's datasheet for accurate details.

5. Control Signal:

   • 5V TTL Compatible: The relay module is controlled using a 5V TTL (Transistor-Transistor Logic) signal from a microcontroller such as Arduino, Raspberry Pi, or similar.

6. Isolation:

   • Optical Isolation: Features optocouplers to provide electrical isolation between the low-voltage control side and the high-voltage load side. This protects the control circuitry from high-voltage spikes and provides safety.

7. Indicator LEDs:

   • LED Indicators: Each relay channel typically has an onboard LED that lights up when the corresponding relay is activated. This provides visual feedback on the relay's status.

8. Relay Pins:

   • VCC: Power supply pin (12V DC) for energizing the relay coils.
   • GND: Ground pin for the relay module.
   • IN1 to IN8: Control pins for each of the eight relays. These pins receive 5V TTL signals to activate the relays.
   • NO (Normally Open): Relay contact that closes when the relay is activated.
   • NC (Normally Closed): Relay contact that opens when the relay is activated.
   • COM (Common): Common terminal for each relay.

Applications:

• Home Automation: Control multiple household appliances such as lights, fans, and other devices from a central control system.
• Industrial Control: Switch on or off multiple industrial equipment or machinery.
• Power Management: Manage power to several devices in experimental setups or prototypes.
• Automated Systems: Integrate into systems that require switching between different operational states.

Example Connection with Arduino:

To connect and control a 12V 8-Channel Relay Module with an Arduino, follow these steps:

Wiring Instructions:

1. Relay Module to Arduino:

   • VCC (Relay Module) to 5V (Arduino) (Note: Some modules may require a separate 12V power supply for the relay coils, so check the module’s specifications).
   • GND (Relay Module) to GND (Arduino).
   • IN1 to IN8 (Relay Control Pins) to Digital Pins 2 to 9 (Arduino) (one pin per relay channel).

2. Load Connection:

   • NO (Relay) to one terminal of the load.
   • COM (Relay) to the power source (AC or DC).
   • Other terminal of the load to the ground or neutral of the power supply.
   • Repeat for each relay channel as needed.