This is the 12V variant of the 12V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU in Relay Modules. Available at ₹1,085.60 (₹920.00 + GST) with free shipping across India.
PRODUCT DESCRIPTION
This is a 12V Modbus RTU 8 Channels Relay Module Input Optocoupler Isolation RS485 MCU. It is used to control various appliances and other equipment with a large current. It can be controlled directly by a Micro-controller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic). 12V 8-Channel Relay interface board and each one needs 50-60mA Driver Current. Equipped with high-current relay, AC250V 10A ; DC30V 10A.
Application:
- Supports all MCU control.
- The industrial field.
- PLC control.
- Smart home control.
Features:
- .Modbus serial communication
- Relay switching output
- Convenient AT command control
Specification:
- Product Name:8 Bit ModbusRTU Relay Module
- MCU: One STM8S103K
- Working Voltage: DC 12 V
- Work Temperature:-25℃~85℃
- Work Humidity:5%~95%RH
- Size:140*80*20mm
Package Includes:
1 x 12V Modbus RTU 8 Channels Relay Module Input Optocoupler Isolation RS485 MCU
12V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Overview
This 12V Modbus RTU 8-channel relay module features optocoupler isolation and RS485 communication driven by an STM8S103K MCU. It allows industrial-grade switching of high-current loads up to AC250V 10A or DC30V 10A via Modbus RTU commands.
Key Features of 12V Modbus RTU 8, Channels Relay Module, Input Optocoupler,
- Eight high-current relays rated AC250V 10A & DC30V 10A for diverse appliances
- Optocoupler-isolated RS485 interface supporting Modbus RTU serial communication
- Onboard STM8S103K MCU with AT-style command set for easy integration
- Compatible with Arduino, 8051, AVR, PIC, ARM, MSP430 and TTL logic controllers
- Wide operating range: DC 12V supply, –25℃ to 85℃, 5%–95% RH
- Genuine product, fast shipping from Zbotic with secure packaging
Applications and Use Cases
- Industrial automation: control conveyor belts, solenoid valves, heaters
- Smart home: manage lighting circuits, motorized curtains, security alarms
- PLC or SCADA integration via Modbus RTU over RS485 bus
- Pump and fan control in water treatment or HVAC systems
- Laboratory equipment switching for timed tests and processes
How to Use 12V Modbus RTU 8, Channels Relay Module, Input Optocoupler,
Connect a regulated DC 12V supply to the module’s power terminals, wire the RS485 A/B lines to your controller or converter, then assign a Modbus address via AT commands (e.g., “AT+ADDR=01”). Send “AT+RELx=ON/OFF” commands over RS485 to toggle each relay, monitoring status through reply frames. Ensure correct grounding and observe driver current of 50–60 mA per channel.
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 with an Arduino?
Yes. Use an RS485-to-TTL converter connected to your Arduino’s serial port. Power the module with 12V, connect A/B lines to the converter, then send Modbus RTU AT commands to switch relays.
How do I set or change the Modbus device address?
Enter the command “AT+ADDR=
What isolation and protection does the module provide?
Each input is optocoupler-isolated from the relay coils and RS485 transceiver, protecting your MCU from voltage spikes and electrical noise during switching.
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Read More →Technical Specifications
| Operating Voltage | 12V |
|---|---|
| Interface / Protocol | RS485 |
| SKU | AI2968 |
| Weight | 0.2002 kg |
| Availability | In Stock |
Applications & Use Cases
The 12V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU 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
