• Available from 2026-11-23 — contact us to reserve
StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1
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  • StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1
  • StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1
  • StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1
  • StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1
  • StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1
  • StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 1

€118.08
Tax included

StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 Card - 16950 UART - Expansion Card - Windows/Linux - TAA, PCIe, Serial, Full-height / Low-profile, RS-232, Green, 214358 h

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PCI Express to Serial Adapter | 921.6Kbps | Windows® and Linux® Compatible<br/><br/>This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot, as if they were native serial ports. The 4 port PCIe serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, and modems, at speeds of up to 921.6Kbps.<br/><br/>Maximum Compatibility<br/><br/>With broad OS support, including for Windows and Linux, this multiport PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-sized bracket, and includes an optional low-profile bracket, so installation is easy regardless of the case form factor. This expansion card is a direct replacement for PEX4S952 .<br/><br/>Experience Optimal Technology<br/><br/>This PCIe to serial adapter supports the following features:<br/><br/>• Industry standard 16950 UART compatible<br/>• Supports max baud rate of up-to 921.6Kbps<br/>• Provides 5/12V power output on Pin 9 when external power is connected<br/>• 256-byte depth FIFO cache per transmitter and receiver<br/>• Supports 9, 8, 7, 6, 5 data bits (one per port)<br/>• Asix AX99100A chipset<br/>• Base PCI Express 1.1 compliant<br/><br/>The Choice of IT Pros Since 1985<br/><br/>StarTech.com conducts thorough compatibility and performance testing on all our products to ensure we are meeting or exceeding industry standards and providing high-quality products to IT Professionals. Our local StarTech.com Technical Advisors have broad product expertise and work directly with our StarTech.com Engineers to provide support for our customers both pre and post-sales.

Technical specifications

Ports & interfaces

Host interfacePCIe
Output interfaceSerial
Expansion card form factorFull-height / Low-profile
Serial ports quantity4
Serial interface typeRS-232

Design

InternalYes
Product colourGreen
Mean time between failures (MTBF)214358 h
CertificationCE, FCC, Microsoft WHQL

Features

ChipsetAsix AX99100
Baud rate921.6 Kbit/s
FIFO (First In, First Out)256 B
Data bits5, 6, 7, 8, 9
Stop bits1, 1.5, 2
Parity bitEven, Mark, No, Odd, Space
Flow Control typeNo, RTS/CTS, XON/XOFF

Operational conditions

Operating temperature (T-T)-10 - 80 °C
Storage temperature (T-T)-20 - 100 °C
Operating relative humidity (H-H)5 - 85%

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 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 supportedYes
Server operating systems supportedWindows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016

Technical details

Compliance certificatesRoHS

Weight & dimensions

Width63 mm
Depth75 mm
Height15 mm
Weight50 g
StarTech.com
FL78297400
2026-11-23

Data sheet

Colour
Vert

Specific References

EAN13
0065030888257
MPN
PEX4S953
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