This is the 12V variant of the 12V Modbus RTU 1Channel Relay Module, Input Optocoupler Isolation RS485 MCU for Arduino in Relay Modules. Available at ₹335.12 (₹284.00 + GST) with free shipping across India.
Looking for Rs485 Module 12v? 12V Modbus RTU 1Channel Relay Module, Input Optocoupler Isolation RS485 MCU for Arduino is available at Zbotic with fast shipping across India.
PRODUCT DESCRIPTION
This module features a single channel for the Modbus RTU relay and is equipped with a dependable 8-bit MCU and an RS485 level communication chip. It adheres to the standard Modbus RTU protocol for RS485 communication. The module is capable of detecting 2-bit input signals and providing 2-bit relay outputs, making it ideal for digital detection or power control applications.
Application:
- This product is compatible with any MCU control. It can be used for industrial applications, PLC control, and smart home control.
Features:
- This text describes the features of a device that uses Modbus serial communication, relay switching output, and convenient AT command control. A possible rewrite is:- Communicate with other devices via Modbus serial protocol
– Switch relays on and off with output signals
– Control the device easily with AT commands
Specification:
- Product Name:1 Bit ModbusRTU Relay Module
- Working Voltage: DC 12V
- Working Current:1A
- Work Temperature:-25℃~85℃
- Work Humidity:5%~95%RH
- Size:84*27*20mm
Package Includes:
1 x 12V Modbus RTU 1 Channels Relay Module
12V Modbus RTU 1Channel Relay Module, Input Optocoupler Overview
The 12V Modbus RTU 1Channel Relay Module is a compact RS485-enabled board featuring one isolated relay output and two optocoupler-isolated digital inputs. It leverages a built-in 8-bit MCU and standard Modbus RTU protocol to enable remote switching and digital signal monitoring for Arduino, PLCs, or industrial controllers.
Key Features of 12V Modbus RTU 1Channel Relay Module, Input Optocoupler
- Single relay output channel driven at 12V DC with up to 1A coil current
- Two optocoupler-isolated digital inputs for reliable signal detection
- Integrated 8-bit MCU and RS485 level converter supporting Modbus RTU
- Wide operating temperature range (-25℃ to 85℃) and 5%–95% RH tolerance
- Compact footprint (84 × 27 × 20 mm) for space-constrained installations
- Genuine product, fast shipping across India from Zbotic
Applications and Use Cases
- Industrial automation: remote start/stop of machinery over RS485
- PLC and SCADA integration using Modbus RTU for centralized control
- Smart home systems: control lighting, pumps or HVAC zones
- Arduino projects requiring isolated relay switching and input monitoring
- Greenhouse or environmental control with digital sensor feedback
- Remote on/off control for small DC motor drives or solenoids
How to Use 12V Modbus RTU 1Channel Relay Module, Input Optocoupler
Wire 12V DC to the module’s power terminals, connect RS485 A/B to your controller or RS485-to-TTL adapter, set a unique Modbus RTU slave address, then use standard Modbus function codes to read input states and energize the relay. Attach your load between COM and NO to switch it on or off.
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 communication protocol does the module use?
It uses the Modbus RTU protocol over RS485, allowing reliable half-duplex communication with any master device that supports standard Modbus RTU function codes.
How many digital inputs and relay outputs are available?
This board provides two optocoupler-isolated digital input channels for signal detection and one relay output channel capable of switching 12V DC loads up to 1A.
Can I connect this relay module to an Arduino?
Yes, by adding an RS485-to-TTL converter to your Arduino, you can send Modbus RTU commands to this module to control the relay and read input status directly from your sketch.
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Read More →Technical Specifications
| Operating Voltage | 12V |
|---|---|
| Channels | 1-channel |
| Interface / Protocol | RS485 |
| SKU | AI3320 |
| Weight | 0.0325 kg |
| Availability | Out of Stock |
Applications & Use Cases
The 12V Modbus RTU 1Channel 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
