--- product_id: 3800587 title: "Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port" brand: "syba" price: "149.84 DT" currency: TND in_stock: true reviews_count: 12 category: "Syba" url: https://www.desertcart.tn/products/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie store_origin: TN region: Tunisia --- # Up to 2.5Gbps PCIe x1 throughput 256-byte FIFO buffer for smooth data flow Supports RS232, RS422 & RS485 serial standards Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port **Brand:** syba **Price:** 149.84 DT **Availability:** ✅ In Stock ## Summary > 🚀 Upgrade your legacy gear with lightning-fast, versatile serial power! ## Quick Answers - **What is this?** Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port by syba - **How much does it cost?** 149.84 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/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie) ## Best For - syba enthusiasts ## Why This Product - Trusted syba brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Data Handling:** On-chip 256-byte FIFO ensures lag-free, reliable transmission even under heavy loads. - • **Blazing Fast PCIe x1 Speed:** Experience seamless data transfer with up to 2.5Gbps throughput, perfect for demanding serial communication tasks. - • **Compact Low Profile Design:** Fits effortlessly into slim or space-constrained workstations without compromising performance. - • **Cost-Effective Reliability:** Top-tier MCS9922 chipset backed by a 3-year warranty — premium quality without the premium price tag. - • **Universal Serial Compatibility:** Supports RS232, RS422, and RS485 standards, making it your go-to adapter for diverse industrial and professional setups. ## Overview The Syba SD-PEX15021 is a single-port PCI Express x1 serial adapter card featuring the advanced MCS9922 chipset. It supports industrial-standard UART protocols with data rates up to 250Kbps per port and complies fully with PCIe 1.0a specifications. Designed for professional environments, it offers a low-profile form factor, hardware/software flow control, and compatibility with RS232, RS422, and RS485 serial standards. Ideal for expanding serial connectivity in modern PCs, it delivers reliable performance at a fraction of competitor costs, backed by a 3-year warranty. ## Description MCS9922 is a single lane multifunction PCI express to I/O controller. It supports two serial ports and eight GPIO's. MCS9922 also provides an option for peripheral expansion through proprietary Cascade interface. The generic cascade interface allows interconnecting with similar chips like MCS9900 to expand the peripheral ports.The serial ports are compatible with RS232, RS422 & RS485 standards and supports throughput from 50bps to 16Mbps. All the GPIO pins are programmable and can be used as Input or Output. An I C interface is provided to configure MCS9922 device options through an external EEPROM. Review: one of two choices on the market - This has worked well for us on windows 7 pro x64. We've only found one other comparable product that is 3x the price. We noticed there are two drivers for these pcie cards - one multifunction and one serial uart - we manually choose the uart driver during install and everything is happy. We use the low profile bracket - which is kind of a hassle to take off the full bracket off and install the low profile. It also seems a bit hard to fit into the slot - maybe something with the bracket itself - but it works after a bit of wriggling. Worth it for 1/3 the price of the competitor product. Review: Reviewing the Best Connectivity SD-PEX15021 PCI Express RS232 1x Serial Port - I received this product and wasn't quite sure what to make of the tiny plug-in edge card. Only when I realized that it could plug into any PCI express port, given the "notch" in the board lined up correctly, did I decide to give it a try. Bingo! This card works wonderfully and is used as a CAT (Computer Aided Tranceiver) control port for my Amateur Radio Tranceiver. There is no problem, my computer immediately recognized the RS232 PCI express card. This is a fine product for the cost and offers the additional RS232 serial port I required to match my radio with computer software. This is my second purchase from Best Connectivity and I would rate the product with Five (5) stars all the way! ## Features - MCS9922 Chipset - Compatible with Industrial Standard 16C550 UART. On Chip 256-byte Depth FIFO in Transmit. - Transfer data rates up to 250Kbps on each port. Supports hardware and software flow control. Supports 5, 6, 7, 8-bit Serial format - Fully compliant with PCI-Express base Specification Revision 1. 0a - Single-lane (x1) PCI-Express with throughput up to 2. 5Gbps - Form Factor: Low profile ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003BYRO7E | | Best Sellers Rank | #18 in Serial Port Cards | | Brand | Syba | | Built-In Media | (1) 1-port Serial PCI-Express Card Low Profile Bracket^(1) Driver CD^(1) User's Manual | | Compatible Devices | Personal Computer | | Customer Reviews | 4.3 out of 5 stars 57 Reviews | | Global Trade Identification Number | 00172302676488 | | Hardware Interface | PCI Express x1 | | Item Type Name | Syba Single Port RS-232 DB9 Serial PCI-e 2.0 x1 Expansion Card MCS9922 SD-PEX15021 | | Item Weight | 4 ounces | | Manufacturer | Syba | | Mfr Part Number | SD-PEX15021 | | Model Number | SD-PEX15021 | | Operating System | Windows | | Style | 1 Port DB9 Serial PCI-e 1.0 x1 Card | | Style Name | 1 Port DB9 Serial PCI-e 1.0 x1 Card | | UPC | 168141446214 172302676488 163121142292 810154012923 132017922881 | | Unit Count | 1.0 Count | | Warranty Description | 3 Year Warranty | ## Product Details - **Brand:** Syba - **Compatible Devices:** Personal Computer - **Hardware Interface:** PCI Express x1 - **Item Weight:** 0.25 Pounds - **Style:** 1 Port DB9 Serial PCI-e 1.0 x1 Card ## Images ![Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port - Image 1](https://m.media-amazon.com/images/I/71EBiES1FdL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ one of two choices on the market *by C***P on January 21, 2012* This has worked well for us on windows 7 pro x64. We've only found one other comparable product that is 3x the price. We noticed there are two drivers for these pcie cards - one multifunction and one serial uart - we manually choose the uart driver during install and everything is happy. We use the low profile bracket - which is kind of a hassle to take off the full bracket off and install the low profile. It also seems a bit hard to fit into the slot - maybe something with the bracket itself - but it works after a bit of wriggling. Worth it for 1/3 the price of the competitor product. ### ⭐⭐⭐⭐⭐ Reviewing the Best Connectivity SD-PEX15021 PCI Express RS232 1x Serial Port *by B***8 on November 21, 2010* I received this product and wasn't quite sure what to make of the tiny plug-in edge card. Only when I realized that it could plug into any PCI express port, given the "notch" in the board lined up correctly, did I decide to give it a try. Bingo! This card works wonderfully and is used as a CAT (Computer Aided Tranceiver) control port for my Amateur Radio Tranceiver. There is no problem, my computer immediately recognized the RS232 PCI express card. This is a fine product for the cost and offers the additional RS232 serial port I required to match my radio with computer software. This is my second purchase from Best Connectivity and I would rate the product with Five (5) stars all the way! ### ⭐⭐⭐⭐ Have not figured out how to use the "re-map function for legacy ports" *by R***S on August 28, 2011* Works well on Windows 7, but have not figured out how to use the "re-map function for legacy ports". Drivers are available on mini-CD and online, but I have not been able to find any other technical documentation. ## Frequently Bought Together - Single Port PCI Express x1 RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Single Serial DB9 Port - SABRENT USB 2.0 to Serial (9 Pin) DB 9 RS 232 Converter Cable, Prolific Chipset, HEXNUTS, [Windows 11/10/8.1/8/7/VISTA/XP, Mac OS X 10.6 and Above] 2.5 Feet (CB-DB9P) --- ## 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/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie](https://www.desertcart.tn/products/3800587-single-port-pci-express-x1-rs232-serial-adapter-card-pcie) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-22*