---
product_id: 61474910
title: "RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module with Over-Voltage Over-Current Protection- (5V)"
brand: "knacro"
price: "¥3097"
currency: JPY
in_stock: true
category: "Knacro"
url: https://www.desertcart.jp/products/61474910-rs422-to-ttl-uart-mcu-serial-port-signal-mutual-conversion
store_origin: JP
region: Japan
---

# 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:** ¥3097
**Availability:** ✅ In Stock

## Summary

> 🔗 Elevate your serial communication game with fail-safe, full-duplex power!

## 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?** ¥3097 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/61474910-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-and-Play Wiring:** Clear terminal pinouts and included wiring diagram make setup effortless
- • **Visual Status Indicators:** Power and send/receive LEDs keep you informed at a glance
- • **Rock-Solid Signal Integrity:** SMD components boost EMC for flawless data flow in harsh environments
- • **Real-Time Circuit Protection:** Built-in over-voltage and over-current safeguards keep your MAX490 chip safe
- • **Universal Voltage Compatibility:** Seamlessly supports both 3.3V and 5V TTL systems for versatile integration

## Overview

This RS422 to TTL/UART/MCU conversion module enables seamless full-duplex serial communication between RS422 and TTL devices, supporting both 3.3V and 5V systems. Featuring robust over-voltage and over-current protection circuits, it safeguards the MAX490 chip for reliable operation. Equipped with SMD components for enhanced EMC performance, power and TX/RX indicator LEDs, and a user-friendly wiring diagram, this compact module is engineered for professional-grade, durable signal conversion in demanding environments.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B078MYJH45 |
| Best Sellers Rank | #251 in Serial Port Cards |
| Customer Reviews | 5.0 5.0 out of 5 stars (2) |
| Date First Available | December 26, 2017 |
| Item Weight | 0.352 ounces |
| Item model number | EXPSFD005980 |
| Manufacturer | KNACRO |
| Package Dimensions | 6.02 x 3.39 x 0.71 inches |

## 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)

## Available Options

This product comes in different **Size** options.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-26*