This is the 12V variant of the 12V Modbus RTU 4, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU for, Arduino in Relay Modules. Available at ₹539.26 (₹457.00 + GST) with free shipping across India.
PRODUCT DESCRIPTION
This board features four 12V relays designed to switch high-current devices. It is directly controllable through microcontrollers like Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, or TTL logic. Each relay necessitates a driving current of 50-60mA and is capable of handling up to 10A at AC250V or DC30V. Features include:
- .Modbus serial communication
- Relay switching output
- Convenient AT command control
Application:
- Supports all MCU control.
- The industrial field.
- PLC control.
- Smart home control.
Specification:
| Product Name | 4 Bit ModbusRTU Relay Module |
|---|---|
| Working Voltage | DC 12V |
| Working Current | 1A |
| Working Temperature Range (°C) | -25℃~85℃ |
| Working Humidity Range | 5%~95%RH |
| Size(mm) | 78*78*20mm |
| Shipping Weight | 0.08 kg |
| Shipping Dimensions | 10 × 9 × 2 cm |
Package Includes:
1 x 12V Modbus RTU 4, Channels Relay Module
12V Modbus RTU 4, Channels Relay Module, Input Optocoupler, Overview
This 12V Modbus RTU relay module features four isolated relays with optocoupler inputs and RS485 communication, designed to switch high-current loads up to 10A. It interfaces directly with microcontrollers like Arduino via Modbus RTU or AT commands, making it ideal for industrial automation, PLC integration, and smart home control.
Key Features of 12V Modbus RTU 4, Channels Relay Module, Input Optocoupler,
- Four 12V DC relays rated for 10A at AC250V/DC30V
- Optocoupler isolation on each input for reliable signal protection
- RS485 interface supporting Modbus RTU protocol
- TTL-compatible control with simple AT command set
- Compact 78×78×20mm PCB for panel or DIN-rail mounting
- Fast shipping from Zbotic
Applications and Use Cases
- Automating lighting, fans or HVAC units in smart home systems
- Controlling pumps and valves in agricultural or water treatment setups
- Integration with PLCs for machinery and process control
- Remote switching of motors and solenoids over RS485 networks
- Laboratory test rigs and prototyping with Arduino or ARM boards
How to Use 12V Modbus RTU 4, Channels Relay Module, Input Optocoupler,
Power the module with 12V DC, connect the RS485 A/B terminals to an RS485-to-UART adapter on your Arduino or other MCU, and link the common and load lines to each relay output. Configure the baud rate and Modbus address via AT commands, then send coil write instructions to toggle relays. Ensure a common ground between module and controller for stable communication.
Why Buy from Zbotic?
- Genuine Products: All items sourced from authorized distributors
- Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
- Free Shipping: Free delivery on qualifying orders
- COD Available: Cash on Delivery, UPI, cards, net banking
- Technical Support: Expert help for setup and troubleshooting
- Easy Returns: Hassle-free replacement for defective products
Frequently Asked Questions
Can I control this module directly from an Arduino?
Yes. By using an RS485-to-UART converter with your Arduino, you can send Modbus RTU commands or AT instructions to switch each relay on or off.
What is the power consumption of the relay coils?
Each relay coil draws approximately 50–60mA at 12V when energized, with the total module current around 1A under full load.
How many modules can I connect on one RS485 line?
The RS485 bus allows up to 32 devices. Assign a unique Modbus address to each module to avoid communication conflicts.
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Read More →Technical Specifications
| Brand | Arduino |
|---|---|
| Operating Voltage | 12V |
| Interface / Protocol | RS485 |
| SKU | AI3324 |
| Weight | 0.08 kg |
| Availability | Out of Stock |
Applications & Use Cases
The 12V Modbus RTU 4, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU for, Arduino is a versatile relay modules used across a wide range of applications including home automation, industrial control, IoT projects, Arduino/Raspberry Pi interfacing, and motor control.
Common use cases:
- Switching high-voltage AC appliances with a microcontroller
- Building a smart home relay board
- Automating irrigation pumps in agriculture
This product is ideal for electronics engineers, IoT developers, and automation hobbyists.
Technical Tip: Use optocoupler-isolated relay modules to protect your microcontroller. Match relay coil voltage to your MCU logic level (3.3V or 5V).
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
- Genuine Arduino product sourced from authorized channels
