---
product_id: 446385770
title: "RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V)"
brand: "knacro"
price: "€ 0.70"
currency: EUR
in_stock: false
url: https://www.desertcart.sk/products/446385770-rs422-to-ttl-uart-mcu-serial-port-signal-mutual-conversion
store_origin: SK
region: Slovakia
---

# Over-voltage & over-current protection Power & TX/RX indicator LEDs Full-duplex RS422 signal conversion RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V)

**Brand:** knacro
**Price:** € 0.70
**Availability:** ❌ Out of Stock

## Summary

> 🔗 Future-proof your serial communication with rock-solid RS422 to TTL conversion!

## Quick Answers

- **What is this?** RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V) by knacro
- **How much does it cost?** € 0.70 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/446385770-rs422-to-ttl-uart-mcu-serial-port-signal-mutual-conversion)

## Best For

- knacro enthusiasts

## Why This Product

- Trusted knacro brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Wiring:** Clear terminal pinout and wiring diagram simplify setup and reduce downtime
- • **Visual Status Feedback:** Integrated power and send/receive LEDs keep you informed at a glance
- • **Robust Signal Integrity:** SMD components boost EMC for flawless data transmission in harsh environments
- • **Universal Compatibility:** Seamlessly converts between 3.3V/5V TTL and RS422 signals for versatile MCU integration
- • **Real-Time Circuit Protection:** Built-in over-voltage and over-current safeguards ensure MAX490 chip longevity

## Overview

This RS422 to TTL/UART/MCU conversion module enables seamless full-duplex communication between RS422 and 3.3V/5V TTL devices. Featuring over-voltage and over-current protection circuits, it safeguards the MAX490 chip for reliable long-term operation. The use of SMD components enhances electromagnetic compatibility, ensuring stable signal transmission even in challenging environments. Equipped with power and TX/RX indicator LEDs and a clear wiring diagram, it offers an intuitive, professional-grade solution for serial port signal conversion.

## Description

Module interface definition: Module 4P Terminal side: VCC: + 3.3V/5V TXD : The module's TTL (UART) to send, connected to the microcontroller's RXD receiver pin; RXD : The module's TTL (UART) receiver, connected to the microcontroller TXD send pin; GND : The module ground wire (this wire must be connected with the ground wire of microcontroller system); Module 5P Terminal side: R + / A : A-Pin of this module, connected to T + / Y pin of other 422 modules; R- / B : B-Pin of this module, connected toT- / Z pin of other 422 modules; T- / Z -: Z-Pin of this module, connected to R- / B of other 422 modules; T + / Y : Y-Pin of this module, connected to R + / A pin of other 422 modules; GND : Ground wire;  Package Included: 1xRS422 to TTL / UART / MCU Serial Port Signal Mutual Conversion Module

## Features

- The module is suitable for 3.3V/5V TTL and RS422 signal mutual conversion, RS422 level is full-duplex level signal, the use of this module can be achieved SCM serial port and RS422 signal conversion.
- With over-voltage and over-current protection circuit real-time protection RS422 level signal to protect the MAX490 chip's normal work.
- The module except for the pin, Use SMD components to ensure better signal transmission, thereby enhancing the system EMC and other characteristics, the module as possible in more harsh environments.
- With power and send & receive Indicator lights.
- The back of the product with wiring diagram.

## Images

![RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V) - Image 1](https://m.media-amazon.com/images/I/812UQ18vlXL.jpg)
![RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V) - Image 2](https://m.media-amazon.com/images/I/81u8t+qAKAL.jpg)
![RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V) - Image 3](https://m.media-amazon.com/images/I/819UIBecGkL.jpg)
![RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V) - Image 4](https://m.media-amazon.com/images/I/81zwIlpSxhL.jpg)
![RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V) - Image 5](https://m.media-amazon.com/images/I/81jFv3ArmFL.jpg)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-17*