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 5V 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 5 V |
| Work Temperature | -25~85 |
| Working Humidity Range | 5%~95%RH |
| Size(mm) | 140*80*20mm |
| Shipping Weight | 0.2 kg |
| Shipping Dimensions | 15 × 8 × 4 cm |
Package Includes:
1 x 5V 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 5V-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.
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Read More →Technical Specifications
| Brand | Arduino |
|---|---|
| Operating Voltage | 5V |
| Interface / Protocol | RS485 |
| SKU | AI3325 |
| Weight | 0.20345 kg |
| Availability | Out of 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
