Name: 5V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU for, Arduino
Brand: Arduino
SKU: AI3325
Price: 980.58 INR
Availability: InStock
Rating: 4.74 (23 reviews)

This is the 5V variant of the 5V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU for, Arduino in Relay Modules. Available at ₹980.58 (₹831.00 + GST) with free shipping across India.

Looking for Relay Module? 5V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Isolation RS485 MCU for, Arduino is available at Zbotic with fast shipping across India.

PRODUCT DESCRIPTION

This module is an 8-channel relay, operating at 12V and using the Modbus RTU protocol via RS485 communication. It incorporates input optocoupler isolation to protect the microcontroller against high voltage spikes. Designed for controlling high-current devices and equipment, it can switch them on or off. The module is versatile and compatible with a range of microcontrollers, including Arduino, 8051, AVR, PIC, DSP, ARM, MSP430, and TTL logic, all of which can directly control its operation. Each relay channel needs a driver current of 50-60mA and can handle loads of up to AC250V 10A or DC30V 10A.

Application:

Supports all MCU control.
The industrial field.
PLC control.
Smart home control.

Note: Product Images are shown for illustrative purposes only and may differ from the actual products.

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
Working Humidity Range	5%~95%RH
Size(mm)	1408020mm
Shipping Weight	0.2 kg
Shipping Dimensions	15 × 8 × 4 cm

Package Includes:

1 x 12V Modbus RTU 8 Channels Relay Module Input Optocoupler Isolation RS485 MCU

5V Modbus RTU 8, Channels Relay Module, Input Optocoupler, Overview

The 5V Modbus RTU 8-Channel Relay Module is a robust 12V-powered board featuring eight high-current relays controllable via RS485 using the Modbus RTU protocol. With built-in optocoupler isolation and an onboard STM8S103K MCU, it’s designed for reliable switching of AC or DC loads in embedded and industrial applications.

Key Features of 5V Modbus RTU 8, Channels Relay Module, Input Optocoupler

Eight SPDT relays each rated for AC 250V 10A or DC 30V 10A
Modbus RTU communication over isolated RS485 interface
Input optocouplers for protection against voltage spikes
Onboard STM8S103K microcontroller for reliable protocol handling
Compatible with Arduino, 8051, AVR, PIC, DSP, ARM, MSP430 and TTL logic
Wide operating range: -25 °C to 85 °C, 5%–95% RH
Fast shipping from Zbotic across India

Applications and Use Cases

Industrial automation: control motors, solenoids and pumps remotely
Building management: manage lighting circuits and HVAC units
Agricultural systems: automate irrigation valves and feeders
Power distribution: switch power banks and UPS lines
Robotics: drive high-current actuators through Modbus commands
Test benches: sequence on/off cycles for electronic DUTs

How to Use 5V Modbus RTU 8, Channels Relay Module, Input Optocoupler

Mount the module on a DIN rail or panel, connect a 12 V DC supply and wire the RS485 A/B lines to your controller’s transceiver. Set the desired Modbus address via onboard DIP switches, then send RTU commands from your Arduino or MCU. Observe the channel LEDs to verify relay activation as you issue coil ON/OFF requests.

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 use this module with an Arduino Uno?

Yes. Pair your Arduino Uno with an RS485 shield or transceiver module, connect DE/RE to a control pin, and the A/B lines to the relay module. Use a Modbus RTU library to send coil commands.

What is the maximum switching current per channel?

Each relay channel supports up to AC 250 V at 10 A or DC 30 V at 10 A, making it suitable for most industrial and home automation loads.

How do I set different addresses for multiple modules?

Use the onboard DIP switch array to assign a unique Modbus address (1–247) to each module, allowing multiple units on the same RS485 bus without conflicts.

Tags: 5V Arduino Buy Online India Industrial Communication Isolation Optocoupler Relay Relay Module RS485 Zbotic

Technical Specifications

Brand	Arduino
Operating Voltage	5V
Interface / Protocol	RS485
SKU	AI3325
Weight	0.20345 kg
Availability	In Stock

Applications & Use Cases

The 5V Modbus RTU 8, 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

Weight	0.20345 kg

15 Days Warranty

Please note that this item is only covered by a standard supplier warranty against manufacturing defects for a period of 15days from the time of delivery. It is important to understand that only manufacturing defects are covered under this warranty, and any other issues will not be considered for reimbursement or replacement. We strongly advise inspecting the product upon delivery to ensure it meets your expectations. In case of any manufacturing defects, we guarantee reimbursement or replacement.