This 12V Modbus RTU 8-Channel Relay Module is designed for industrial and automation projects requiring multiple isolated relay outputs. Featuring input optocoupler isolation and RS485 communication, it ensures safe and reliable operation in high-voltage applications.
✨ Key Features and Benefits
- Eight independent relay channels for versatile control
- 12V power supply suitable for industrial projects
- Input optocoupler isolation ensures safety
- RS485 Modbus RTU communication support
- Compact and easy to integrate with microcontrollers
- High reliability for automation and embedded systems
- Full-duplex relay control and monitoring
- Protection against voltage surges and spikes
- Compatible with Arduino, STM32, ESP32, Raspberry Pi
- Perfect for industrial automation, home automation, and IoT relay projects
🔧 Material and Construction Details
| Component | Material | Description |
|---|---|---|
| PCB | FR4 | Durable printed circuit board with solder mask |
| Relay | Electromechanical | Eight high current channels |
| Optocoupler | Semiconductor | Input isolation for safe MCU connection |
| Connectors | Pin headers | TTL and RS485 interface connections |
| Indicators | LEDs | Status indication for power and relay states |
📚 Use Cases and Applications
- Arduino and MCU-controlled multi-relay projects
- Industrial automation and control systems
- Home automation and IoT relay projects
- RS485 Modbus RTU communication setups
- Embedded systems needing isolated relay outputs
🔍 Technical Specifications
| Specification | Details |
|---|---|
| Channels | 8 Relay Channels |
| Power Supply | 12V DC |
| Communication | RS485 Modbus RTU |
| Isolation | Input Optocoupler |
| Relay Rating | High current switching |
| Interface | TTL / RS485 |
| Indicators | LEDs for power and relay states |
| Dimensions | Compact module size |
| Applications | Industrial automation, embedded systems, IoT |
🧼 Care Information
Store the module in an anti-static bag when not in use. Avoid dust, moisture, and direct sunlight. Handle carefully to prevent pin or connector damage. Verify wiring before powering the module.
⚠ Safety Information
Do not exceed the rated 12V input. Always check TTL and RS485 wiring before connecting. Disconnect power before rewiring. Observe ESD precautions when handling the module.
👍👎 Pros & Cons
| Pros | Cons |
|---|---|
| Eight independent relay channels | Limited to 12V control logic |
| Input optocoupler isolation ensures safety | Not suitable for direct high-voltage AC switching |
| RS485 Modbus RTU support | Requires proper wiring for full operation |
| Compact and easy integration with Arduino | Single module for eight channels only |
| Industrial-grade durability | No onboard display or diagnostics |
🅿 Product Images:
