--- product_id: 13962317 title: "UTEK UT-211 Port-Powered RS-232 to RS-232 Mini-Size PhotoElectric Isolator" brand: "uotek" price: "$29.86" currency: USD in_stock: true reviews_count: 2 url: https://www.desertcart.us/products/13962317-utek-ut-211-port-powered-rs-232-to-rs-232 store_origin: US region: United States of America --- # 2,500Vrms isolation 62mm x 34mm x 18mm -40℃ to 85℃ range UTEK UT-211 Port-Powered RS-232 to RS-232 Mini-Size PhotoElectric Isolator **Brand:** uotek **Price:** $29.86 **Availability:** ✅ In Stock ## Summary > 🔌 Connect with Confidence! ## Quick Answers - **What is this?** UTEK UT-211 Port-Powered RS-232 to RS-232 Mini-Size PhotoElectric Isolator by uotek - **How much does it cost?** $29.86 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/13962317-utek-ut-211-port-powered-rs-232-to-rs-232) ## 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 - • **Robust Isolation:** 2,500Vrms impulse isolation for ultimate safety. - • **Compact Powerhouse:** Mini-size design for seamless integration. - • **Humidity Resilience:** Operates flawlessly in 5% to 95% humidity. - • **Versatile Baud Rate:** Supports 300bps to 57,600bps for flexible applications. - • **Wide Operating Range:** Reliable performance in extreme temperatures. ## Overview The UTEK UT-211 is a compact, port-powered RS-232 to RS-232 mini-size photoelectric isolator designed for robust performance. With a voltage isolation of 2,500Vrms and a wide baud rate range, it ensures safe and reliable data transmission in various environmental conditions, making it an essential tool for professionals in need of dependable connectivity. ## Description UT-211 is a RS-232 serial port optoelectronic isolator. It adopts advanced optoelectronic isolation technology, maximally protects RS-232 serial interface devices from bad environment damage, such as ground loop circuit voltage, surge, lightning, ESD, hot-plug and electromagnetic interference, etc. The damage of RS-232 port is related to communication hardware. The reasons 90% are converged on above mentioned. For example, device A connects device B with RS-232 port, if the voltage difference of ground line between A and B is up to 50V (usually up to 80V), RS-232 port will not working normal; the isolated voltage of RS-232 port will reach 2,500Vrms instantly, together with 500VDC continuous peak voltage difference; it also absorbs in ESD and electromagnetic interference, so as to protect RS-232 port. The optoelectronic isolation technology is fully isolating the electrical devices and ground loop circuit on both ends; it converts the electrical signal to optic signal, then transmits the signal to another end, finally converts it back to electrical signal. This protects the communication device from ground loop circuit and surge interference, which greatly improve the reliability and stability of the communication system. UT-211 gets widely application in point to point RS-232 communication system, UNIX multi-user system, monitoring system, and ATM for power, insurance, telecommunications, railway, post office, finance, banking, securities and program control, etc. ## Features - Standards: RS-232 & CCITTV.24 asynchronous protocol ● Connector: two DB9 on both sides - Transmission mode: asynchronous full-duplex, full transparent ● Isolated voltage: 2,500Vrms impulse or 500VDC - Baudrate: 300bps-57,600bps ● Power: from RS-232(TXD, RTS or DTR) - Dimension: 62mm×34mm×18mm ● Weight: 30g - Operating temperature: -40℃ to 85℃ ● Relative humidity: 5% to 95% ## Product Details - **Compatible Devices:** Television - **Specific Uses For Product:** personal - **Connector Type:** Lightning - **Color:** Transparent - **Item dimensions L x W x H:** 6.4 x 4.4 x 2.3 inches ## Images ![UTEK UT-211 Port-Powered RS-232 to RS-232 Mini-Size PhotoElectric Isolator - Image 1](https://m.media-amazon.com/images/I/51OL1NnCgML.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great. *by F***N on January 11, 2015* Solved a problem I had from equipment that would cause a ground loop noise problem due to one device using a positive grounding scheme. Re-wiring the machine wasn't a viable option but isolating one with this saved so much time. Works great. ### ⭐ Poor documentation *by G***7 on January 12, 2015* This is port powered and must have 5 pin interface as power seems to be pulled from RTS and CTS (or DTR). Very poor documentation. ## Frequently Bought Together - UTEK UT-211 Port-Powered RS-232 to RS-232 Mini-Size PhotoElectric Isolator - Tangxi RS232 to 232 Converter Optical Isolator 2500V Continuous / 7500V Pulse PhotoElectric Optical Isolator 0-57600BPS DB9 Connector for EIA/TIA RS232 and CCITT V.24 Standards - DTECH Port Powered RS232 to RS232 Serial Port Isolator Optic Electric Adapter to Protect You PC and RS-232 Device --- ## 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.us/products/13962317-utek-ut-211-port-powered-rs-232-to-rs-232](https://www.desertcart.us/products/13962317-utek-ut-211-port-powered-rs-232-to-rs-232) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-06-24*