--- product_id: 27752436 title: "UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP)" brand: "uotek" price: "€ 2.99" currency: EUR in_stock: false url: https://www.desertcart.pt/products/27752436-utek-ut-891-usb-rs-485-rs-422-1port-interface store_origin: PT region: Portugal --- # 1555mm x 36mm x 16mm dimensions 1200m transmission distance USB/RS-485/RS-422 connectivity UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) **Brand:** uotek **Price:** € 2.99 **Availability:** ❌ Out of Stock ## Summary > 🔗 Connect Beyond Limits! ## Quick Answers - **What is this?** UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) by uotek - **How much does it cost?** € 2.99 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/27752436-utek-ut-891-usb-rs-485-rs-422-1port-interface) ## Best For - uotek enthusiasts ## Why This Product - Trusted uotek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Design:** Sleek dimensions for easy installation in any setup. - • **Seamless Connectivity:** Experience effortless integration with USB and RS interfaces. - • **Dual Signal Indicators:** Stay informed with TXD and RXD LED indicators. - • **Versatile Compatibility:** Supports a wide range of operating systems including Windows and Linux. - • **Long-Distance Communication:** Achieve reliable data transmission up to 1200 meters. ## Overview The UTEK UT-891 USB/RS-485/RS-422 1-Port Interface Converter is a versatile communication tool designed for seamless data transmission over long distances. With support for multiple operating systems and a compact design, it ensures reliable connectivity in various applications. ## Description UT-891 is needing no additional power supplies, compatible with USB, RS-422 and RS-485 standards. It can convert the single-terminal USB signals into balanced differential RS-422 or RS-485 signals, provid ing surge protect ion power for each line. The surge voltage caused by different reasons on lines and the extremely tiny interelectrode capacitance guarantee high speed transmission of RS-422/RS-48 interface. RS-422 and RS-485 terminal connect by RJ-45 and DB9 male connector. The internal converter has the function of zero delay automatic sending and receiving conversion and the independent I/O circuit controls data flow direction; it doesn't need shake hands signals (e.g. RTS and DTR, etc. ) and jumper settings to realize full duplex (RS-422) and half-duplex (RS-485) modes conversion and plug and play. It ensures applicable to all current communication software and interface hardware. For point to multi-point, each converter can allow connecting 32 RS-422 or RS-485 interface equipment.1. Standard: conform to USBV1.1, 1.0, 2.0 standard, EIA RS-485 and RS-422 standard 2. USB signals: VCC, DATA+, DATA-, GND, FG 3. RS-485 signals: T/R+, T/R-, GND 4. RS-422 signals: T/R+, T/R-, RXD+, RXD-, GND 5. Working mode: asynchronous working, point to point or multi-point, 2 wires half duplex, 4 wires full duplex 6. Direction control: apply data flow automatic control technology, automatically identify and control data transmission direction 7. Baud rate: 300-921.6Kbps, automatically detect serial port signal rate 8. Load capacity: support point to multi-point, each converter can allow connecting 32 RS-422 or RS-485 interface equipment 9. Transmission distance: 1200 meters at RS-485/422 terminal (at 9600bps), the USB port shall not surpass 5 meters 10. Interface protection: surge protection, 15KV electrostatic protection 11. Interface form: Class A interface male connector for USB terminal, DB9 male connector for connection ## Features - Point to point/four-wire full duplex /Point to point/two-wire half duplex - Point to multi-point/ four-wire full duplex / Point to multi-point/two-wire half duplex - Transmission media: twisted-pair or shielded wire. / Overall dimension: 1555mmx36mmx16mm - Signal indication: 2 signal indicator lights: Transmit Data (TXD) and Receive Data (RXD) - Transmission distance: 0-1200 meters./Support Win/98/Win2000/WinXP/Vista/Win7/Linux, etc ## Product Details - **Connector Type:** RJ45 - **Item dimensions L x W x H:** 6 x 4 x 1.4 inches - **Brand:** UOTEK - **Item Weight:** 0.44 Pounds - **Number of Ports:** 1 ## Images ![UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) - Image 1](https://m.media-amazon.com/images/I/51sQXCnPV5L.jpg) ![UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) - Image 2](https://m.media-amazon.com/images/I/41H3zdsExbL.jpg) ![UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) - Image 3](https://m.media-amazon.com/images/I/51quKi1sUmL.jpg) ![UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) - Image 4](https://m.media-amazon.com/images/I/417pT0GcSjL.jpg) ![UTEK UT-891 USB/RS-485/RS-422 1Port Interface Converter(CP) - Image 5](https://m.media-amazon.com/images/I/417pT0GcSjL.jpg) --- ## 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.pt/products/27752436-utek-ut-891-usb-rs-485-rs-422-1port-interface](https://www.desertcart.pt/products/27752436-utek-ut-891-usb-rs-485-rs-422-1port-interface) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-06*