--- 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: "66.43 DT" currency: TND in_stock: true category: "Knacro" url: https://www.desertcart.tn/products/61474910-rs422-to-ttl-uart-mcu-serial-port-signal-mutual-conversion store_origin: TN region: Tunisia --- # 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:** 66.43 DT **Availability:** ✅ In Stock ## Summary > 🔗 Connect smarter, protect better — RS422 meets TTL with confidence! ## 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?** 66.43 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 - • **Clear Wiring Diagram Included:** Simplifies installation and integration, saving you valuable setup time. - • **Intuitive Power & Data Flow Indicators:** Real-time LEDs keep you informed of module status and communication activity. - • **Seamless 3.3V/5V TTL & RS422 Conversion:** Effortlessly bridge microcontrollers and industrial RS422 networks with full-duplex communication. - • **Premium SMD Components for Signal Integrity:** Enhanced EMC performance ensures reliable data transmission even in noisy setups. - • **Robust Over-Voltage & Over-Current Protection:** Safeguard your MAX490 chip and system integrity in demanding environments. ## Overview The RS422 to TTL/UART/MCU Serial Port Signal Mutual Conversion Module by KNACRO enables reliable full-duplex communication between 3.3V/5V TTL devices and RS422 networks. Featuring over-voltage and over-current protection circuits, premium SMD components for enhanced EMC, and intuitive LED indicators, this compact module ensures robust signal integrity and system safety in industrial and embedded applications. ## 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 | #219 in Serial Port Cards | | Customer Reviews | 5.0 5.0 out of 5 stars (2) | | Date First Available | December 26, 2017 | | Is Discontinued By Manufacturer | No | | 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) ![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) ## Available Options This product comes in different **Size** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/61474910-rs422-to-ttl-uart-mcu-serial-port-signal-mutual-conversion](https://www.desertcart.tn/products/61474910-rs422-to-ttl-uart-mcu-serial-port-signal-mutual-conversion) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-20*