Boardoza RS485 5V Transceiver Breakout Board
A 5V RS-485 transceiver breakout board using the HTC Korea MAX485 chip for reliable long-distance communication.
The Boardoza RS485 5V Transceiver Breakout Board is a robust long-distance communication interface built around the HTC Korea MAX485 RS-485 transceiver. Designed for 5V systems, this board enables stable half-duplex differential communication, making it ideal for electrically noisy environments and extended cable runs.
With its stable, high-speed, and interference-resistant communication capabilities, this module is perfectly suited for industrial automation, sensor networks, CNC systems, building management, and microcontroller-based communication projects.
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| Front Side | Back Side |
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Key Features
- Maker-Ready RS-485 Communication: Easily add long-range wired communication to Arduino, ESP8266, ESP32, STM32, Raspberry Pi, and more.
- MAX485 Transceiver from HTC Korea: Industry-standard +5V differential driver/receiver for reliable RS-485 networks.
- Stable Half-Duplex Operation: Perfect for multi-node communication, sensor buses, and distributed control systems.
- High Noise Immunity: Differential signaling ensures reliable operation even in environments with motors, relays, and EMI sources.
- Beginner-Friendly Wiring: Screw terminals and header pins allow fast prototyping and permanent installations.
- 5V Logic Compatibility: Ideal for classic microcontrollers such as Arduino UNO, Mega, and many industrial controllers.
- High-Speed Data Support: Supports up to 10 Mbps communication speed for demanding applications.
Technical Specifications
Manufacturer: HTC Korea
Model: MAX485
Input Voltage: 5V
Voltage Input Type: Screw terminal / 4-pin header
Interface: RS-485 (Half-Duplex)
Logic Level: 5V
Data Rate: Up to 10 Mbps
Receiver Input Range: ±7V
Functions: RS-485 Transceiver Module
Operating Temperature: –20°C ~ +85°C
Board Dimensions: 40mm × 40mm
Board Pinout
( J1 ) Input Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TXD | Module TXD Pin |
| 3 | RXD | Module RXD Pin |
| 4 | VCC | Power Input (5V) |
( J2 ) Input Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | TXD | Module TXD Pin |
| 3 | RXD | Module RXD Pin |
| 4 | VCC | Power Input (5V) |
( J3 ) RS-485 Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | COM | Common Ground |
| 2 | B | Inverting Driver/Receiver Line |
| 3 | A | Non-Inverting Driver/Receiver Line |
( J4 ) RS-485 Connector
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | COM | Common Ground |
| 2 | B | Inverting Driver/Receiver Line |
| 3 | A | Non-Inverting Driver/Receiver Line |
Board Dimensions
Step Files
Boardoza RS485 5V Transceiver Breakout Board.step
Datasheet
Version History
- V1.0.0 – Initial Release
Support
For technical questions or assistance, please contact support@boardoza.com
License
Shield: 
This work is licensed under a
Creative Commons Attribution-ShareAlike 4.0 International License.
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