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ShopNIC & Network AdaptersStarTech.com 2-Port PCI Express Serial Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Standard or Low Profile Brackets, COM Retention, For Windows & Linux
StarTech.com 2-Port PCI Express Serial Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Standard or Low Profile Brackets, COM Retention, For Windows & Linux
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StarTech.com 2-Port PCI Express Serial Card, Dual Port PCIe to RS232 (DB9) Serial Card, 16C1050 UART, Standard or Low Profile Brackets, COM Retention, For Windows & Linux

£41.11

£49.33 inc. VAT

Low Stock(5)MPN: 21050-PC-SERIAL-CARD
🚚 Next-day delivery £4.95
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Key Features

StarTech.com 2-Port PCI Express Serial Card, Dual Port PCIe to RS232 (DB9) Serial Interface Card, 16C1050 UART, Standard or Low Profile Brackets, COM Retention, For Windows & Linux
PCIe to Dual DB9 Card (21050-PC-SERIAL-CARD)
Serial adapter
PCIe 2.0 low profile
RS-232 x 2
yellow

Product Overview

AI-generated summary

For £45 ex-VAT, this StarTech dual-port RS232 card is the sort of “quiet utility hero” you buy when you have legacy kit that absolutely refuses to speak anything modern. If you’re running Windows or Linux boxes in the UK with serial gear—think routers/console servers, some industrial controllers, old measurement equipment—this is a sensible, low-fuss way to add two extra COM ports without faffing with USB serial adaptors that can be flaky or driver-dependent. StarTech is usually solid on compatibility, and the presence of low-profile + standard brackets plus COM retention means you’re less likely to break existing software that expects COM3/COM4 to stay put.

That said, I wouldn’t buy it if you’re trying to “modernise” anything. RS232 is slow and electrically temperamental over distance, and for new deployments USB-to-serial or Ethernet/serial consoles are often easier to manage—especially where you need more than a couple of ports or hot-plug reliability. Also, if you’re planning high-throughput serial workloads or strict timing (certain industrial telemetry patterns), verify your device’s baud rate and signal requirements first; most people only discover the gotchas after the fact. Bottom line: great value for small, legacy serial port needs—less ideal if you’re building something forward-looking or needing more scale.

Specifications

Ports & interfaces

Host interfacePCIe
Output interfaceSerial
Expansion card form factorFull-height / Low-profile
Expansion card standardPCI 2.0
Serial ports quantity2

Design

InternalY
Product colourYellow
LED indicatorsActivity

Features

ChipsetASIX - AX99100, ASIX - ZT3243LFEY
Baud rate921.6 Kbit/s
FIFO (First In, First Out)256 B
Data bits5,6,7,8,9
Flow control supportY

Operational conditions

Operating temperature (T-T)0 - 55 °C
Storage temperature (T-T)-40 - 75 °C
Operating relative humidity (H-H)5 - 95 %

System requirements

Windows operating systems supportedWindows 10,Windows 10 Education,Windows 10 Education x64,Windows 10 Enterprise,Windows 10 Enterprise x64,Windows 10 Home,Windows 10 Home x64,Windows 10 IOT Core,Windows 10 IoT Enterprise,Windows 10 Pro,Windows 10 Pro x64,Windows 10 x64,Windows 11,Windows 11 x64,Windows 7,Windows 7 Enterprise,Windows 7 Enterprise x64,Windows 7 Home Basic,Windows 7 Home Basic x64,Windows 7 Home Premium,Windows 7 Home Premium x64,Windows 7 Professional,Windows 7 Professional x64,Windows 7 Starter,Windows 7 Starter x64,Windows 7 Ultimate,Windows 7 Ultimate x64,Windows 7 x64,Windows 8,Windows 8 Enterprise,Windows 8 Enterprise x64,Windows 8 Pro,Windows 8 Pro x64,Windows 8 x64,Windows 8.1,Windows 8.1 Enterprise,Windows 8.1 Enterprise x64,Windows 8.1 Pro,Windows 8.1 Pro x64,Windows 8.1 x64
Linux operating systems supportedY
Server operating systems supportedWindows Server 2016,Windows Server 2019

Technical details

Compliance certificatesCE,RoHS

Weight & dimensions

Width65 mm
Depth67 mm
Height18 mm
Weight51 g

Packaging data

Mounting brackets includedY
Quick installation guideY
Package width207 mm
Package depth144 mm
Package height38 mm

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