This is the 5V variant of the 5V Modbus RTU 2Channels Relay Module Input Optocoupler, Isolation RS485 MCU in Relay Modules. Available at ₹352.82 (₹299.00 + GST) with free shipping across India.
PRODUCT DESCRIPTION
This device is a 5V Modbus RTU 2-channel relay module with input optocoupler isolation and RS485 MCU. It is capable of controlling various appliances and equipment that require a large current. The module can be directly managed by a microcontroller, including Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, and TTL logic. It features a 5V 4-channel relay interface board, with each channel requiring a driver current of 50-60mA. The module is equipped with high-current relays rated at AC250V 10A and DC30V 10A.
Application:
- It can be controlled by any MCU.
It is suitable for industrial applications.
It can interface with PLC devices.
It can enable smart home automation.
.
Features:
- This device has the following features:
– It uses Modbus serial protocol to communicate with other devices
– It has relay contacts for switching outputs
– It can be controlled easily with AT commands
Specification:
- Product Name: 5V Modbus RTU 2 Channels Relay Module
- Working Voltage: DC 5V
- Working Current:1A
- Work Temperature:-25℃~85℃
- Work Humidity:5%~95%RH
Package Includes:
1 x 5V Modbus RTU 2 Channels Relay Module Input Optocoupler Isolation RS485 MCU
5V Modbus RTU 2Channels Relay Module Input Optocoupler, Overview
This 2-channel relay module combines Modbus RTU communication over RS485 with optocoupler-isolated inputs, all powered by a stable 5 V DC supply. Designed to switch high-current AC or DC loads, it integrates seamlessly with TTL-level microcontrollers and industrial control systems.
Key Features of 5V Modbus RTU 2Channels Relay Module Input Optocoupler,
- Modbus RTU protocol over RS485 for reliable long-distance communication
- Two mechanical relays rated AC 250 V 10 A and DC 30 V 10 A per channel
- Input optocoupler isolation protects your MCU from voltage spikes
- 5 V DC operation with low driver current (50 – 60 mA per channel)
- Wide operating range: –25 °C to 85 °C, 5 % to 95 % RH
- Fast shipping from Zbotic for quick project deployment
Applications and Use Cases
- Remote control of industrial motors and actuators via Modbus RTU
- Smart home automation for lights, fans and HVAC switching
- Integration with PLCs in factory-floor control networks
- Power management in data centers and server rooms
- Irrigation pump control in agricultural automation systems
How to Use 5V Modbus RTU 2Channels Relay Module Input Optocoupler,
Begin by supplying 5 V DC to the VCC and GND terminals, then connect the RS485 A and B lines to your master controller or RS485 converter. Assign a unique slave ID in your Modbus RTU master and use coil-write commands (function codes 05 or 15) to toggle each relay. Observe proper bus termination and ensure the module’s ground is common with your 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
How do I connect the RS485 interface?
Wire the RS485 A and B terminals to your controller’s differential lines, tie module GND to controller GND, and provide 5 V DC. Use a 120 Ω termination resistor at each end of the bus if distances exceed 50 m.
What load currents can each relay channel handle?
Each relay channel switches up to AC 250 V at 10 A or DC 30 V at 10 A. Ensure your load stays within these limits to prevent contact arcing.
Can I use this with Arduino and other 5 V MCUs?
Yes. The optocoupler inputs are driven by 5 V TTL signals, and you can employ standard Modbus RTU libraries on Arduino, PIC, AVR, ARM or MSP430 platforms for straightforward integration.
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Read More →Technical Specifications
| Operating Voltage | 5V |
|---|---|
| Interface / Protocol | RS485 |
| SKU | AI3321 |
| Weight | 0.06 kg |
| Availability | In Stock |
Applications & Use Cases
The 5V Modbus 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
