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Product specifications

StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows & Linux - TAA

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StarTech 1-Port PCI Express RS232 Serial Adapter Card, PCIe RS232 Serial DB9 Host Controller Card, 16950 UART, Low Profile Expansion Card for Windows and Linux - TAA

Part PEX1S953LP · UPC 065030881159

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  • 1 PORT SERIAL CARD: Serial controller card w/ 16950 UART based on ASIX AX99100A, allows 1x DB9 port w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit; Upgraded version of our popular card PEX1S952LP
  • OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total
  • STANDARD PROFILE & LOW PROFILE BRACKET: PCIe serial card comes w/ a low profile bracket pre-installed & 1x full profile bracket is incl for versatile install; Supports Windows & Linux
  • VERSATILE APPLICATIONS: For low/standard profile desktop/servers w/ uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope
  • THE IT PRO’S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance

About this product

PCI Express to Serial Adapter | 921.4Kbps | Windows® and Linux® Compatible

This RS232 Serial Adapter Card lets you add an RS232 DB9 serial port to your computer through a PCI Express (PCIe) slot. It enables you to interact with serial devices such as card readers, printers, PIN pads, and modems, at speeds of up-to 921.4Kbps.

Maximum Compatibility

With broad OS support, including for Windows and Linux, this PCI Express card is easy to integrate into mixed environments. The card comes pre-configured with a low-profile bracket, and includes an optional full-profile bracket, so installation is easy regardless of the case form factor.

Experience Optimal Technology

This PCIe to serial adapter supports the following features:

• Compatible with industry standard 16950 UART

• Supports max baud rate of up-to 921.4Kbps

• Provides 5/12V power output on Pin 9 when external power is connected

• 128-byte depth FIFO per transmitter and receiver

• Supports 9, 8, 7, 6, 5 data bits

• Asix AX99100A chipset

• PCI Express 1.1 compliant

Manufacturer warranty information

Lifetime

Ports & interfaces

Host interface
PCIe
Output interface
Serial
Expansion card standard
PCIe 1.1
Serial ports quantity
1
Serial interface type
RS-232
Peripheral (Molex) power connectors (4-pin)
1

Design

Internal
Yes
Product colour
Green
Mean time between failures (MTBF)
277385 h

Features

Chipset
Asix AX99100
Baud rate
921.4 Kbit/s
FIFO (First In, First Out)
256 B
Data bits
5, 6, 7, 8, 9
Stop bits
1, 1.5, 2
Flow control support
Yes
Parity bit
Even, Mark, No, Odd, Space
Flow Control type
No, RTS/CTS, XON/XOFF

Operational conditions

Operating temperature (T-T)
0 - 70 °C
Storage temperature (T-T)
-20 - 80 °C
Operating relative humidity (H-H)
20 - 80%

System requirements

Windows operating systems supported
Windows 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 supported
Yes
Server operating systems supported
Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016

Technical details

Sustainability compliance
Yes
Compliance certificates
CE, RoHS

Weight & dimensions

Width
67 mm
Depth
98 mm
Height
150 mm
Weight
44 g

Packaging data

Quantity
1
Mounting brackets included
Yes
Manual
Yes
Package width
143 mm
Package depth
174 mm
Package height
33 mm
Package weight
112 g

Logistics data

Harmonized System (HS) code
84733020
Products per master (outer) case
75 pc(s)
Master (outer) case width
694 mm
Master (outer) case length
358 mm
Master (outer) case height
325 mm

Specifications and images: Database Right data-sheet 2026 Icecat. All rights reserved. Supplied as is, without warranty. Specs Icecat · Open Content License

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