PRODUCT DESCRIPTION
The product is a 12V Modbus RTU 2-Channel Relay Module, equipped with Input Optocoupler Isolation and an RS485 MCU, designed for controlling various appliances and devices that require substantial current. It can be directly controlled using a Microcontroller such as Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, or TTL logic. The module features two 12V relay channels, each needing a driver current of 50-60mA, and can handle high currents up to AC250V 10A or DC30V 10A.
This application can be used for:
– Controlling any MCU device.
– Industrial applications.
– PLC systems.
– Smart home automation.
This text describes the features of a device or system. It can be rewritten as follows:
– It supports Modbus serial communication for data exchange.
– It can switch relay outputs using different modes and parameters.
– It allows easy control through AT commands.
Specification:
- Product Name: 12V Modbus RTU 2 Channels Relay Module
Working Voltage: DC 12V
Working Current: 1A
Operating Temperature: -25℃ to 85℃
Operating Humidity: 5% to 95% RH
Package Includes:
1 x 12V Modbus RTU 2 Channels Relay Module Input Optocoupler Isolation RS485 MCU
12 V RTU 2Channels Relay Module Input Optocoupler Isolation Overview
The 12 V RTU 2Channels Relay Module with Input Optocoupler Isolation and RS485 MCU is a dual-output switching board that communicates via Modbus RTU protocol. It’s built for 12 V DC systems and handles high-current loads up to AC 250 V/10 A or DC 30 V/10 A, making it ideal for automation and industrial control.
Key Features of 12 V RTU 2Channels Relay Module Input Optocoupler Isolation
- Modbus RTU communication over RS485 for reliable data exchange
- Two independent 12 V relay channels with optocoupler input isolation
- Switching capacity up to AC 250 V/10 A or DC 30 V/10 A per channel
- Low coil driver current of 50–60 mA per relay
- Wide operating range: -25 °C to 85 °C, 5%–95% RH
- Genuine product with fast shipping from Zbotic
Applications and Use Cases
- Integration into PLC and SCADA systems
- Smart home control for lighting, fans, and HVAC
- Irrigation pump switching in agricultural automation
- Remote control of motors and heavy appliances
- Test benches and OEM equipment requiring isolated outputs
How to Use 12 V RTU 2Channels Relay Module Input Optocoupler Isolation
Connect a stable 12 V DC supply to the VCC and GND terminals, then attach the RS485 A/B lines to your master controller. Wire your load between each relay’s COM and NO/NC contacts. In your Modbus RTU master software or MCU firmware, set the module’s address and send standard function codes to toggle each relay. The optocoupler isolation ensures clean signals and protects your controller from voltage spikes.
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
What power supply and current does this relay module require?
The module requires a 12 V DC supply at up to 1 A. Each relay coil draws approximately 50–60 mA. The contacts can switch loads up to 10 A at AC 250 V or DC 30 V per channel.
How do I establish communication with the module?
Use the RS485 A/B terminals to connect to your Modbus RTU master device. Configure the module’s slave address in your control software, then send Modbus function codes (e.g., 0x05 or 0x0F) to turn each relay on or off.
What is the benefit of optocoupler input isolation?
Optocoupler isolation separates the relay input circuitry from the controller’s ground, preventing electrical noise, voltage spikes, and ground loops from affecting your MCU or RS485 transceiver, ensuring stable and safe operation.
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Read More →Technical Specifications
| Operating Voltage | 12V |
|---|---|
| Interface / Protocol | RS485 |
| SKU | AI3322 |
| Weight | 0.0559 kg |
| Availability | In Stock |
Applications & Use Cases
The 12 V RTU 2Channels 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
