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4-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to
Serial DB9 - 16950 UART - Low Profile Expansion Card - Windows, macOS, Linux
Product ID: PEX4S953LP
This PCI Express RS232 serial adapter card lets you add four RS232 (DB9) serial ports to your computer through a
PCI Express (PCIe) slot. 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.
With broad OS support, including for Windows and Linux, this PCI E serial card is easy to integrate into mixed
environments. The card comes pre-configured with low-profile brackets and includes optional full-profile brackets, so
installation is easy regardless of the case form factor. This card is a direct replacement for PEX4S952LP.
• This PCIe to serial adapter supports the following features:
• Compatible with industry-standard 16950 UART
• Supports max baud rate of up-to 921.6Kbps
• Provides 5/12V power output on Pin 9 when external power is connected
• 256-byte depth FIFO cache per transmitter and receiver
• Supports 9, 8, 7, 6, 5 data bits (one per port)
• Asix AX99100 chipset
PCI Express 1.1 compliant
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.
PEX4S03LP is backed by a StarTech.com lifetime warranty and free lifetime technical support.
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Certifications, Reports and Compatibility
Hardware
Warranty
Lifetime
Ports
4
Interface
Serial
Bus Type
mini PCI Express
Card Type
Standard Profile (LP bracket incl.)
Port Style
Integrated on Card
Chipset ID
Asix AX99100
Performance
Serial Protocol
RS-232
Max Baud Rate
921.6 Kbps
Data Bits
5, 6, 7, 8, 9
FIFO
256 Bytes
Applications
Features
• 4 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 4x DB9 ports
w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer
• OPTIONAL CONFIGURABLE POWER: PCIe multiport serial card provides 12v, 5v, or none through pin 9 w/up to
2A total; Each of the 4 ports are individually configurable; DB44 to 4x DB9 breakout cable incl
• STANDARD PROFILE & LOW PROFILE BRACKET: PCI Express RS232 serial adapter card has low profile bracket
pre-installed & 1x standard bracket incl for versatile install; Supports Windows XP and up & 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
• STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCI-e RS232 Serial expansion card is
backed for life by StarTech.com, incl. free 24/5 North America based multi-lingual tech support
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Flow Control
None, Xon/Xoff, RTS/CTS
Parity
None, Odd, Even, Space, Mark
Stop Bits
1, 1.5, 2
MTBF
214,358 hours
Connector(s)
Connector Type(s)
PCI Express x1
Internal Ports
LP4 (4 pin; Large Drive Power)
External Ports
DB-9 (9 pin, D-Sub)
Software
OS Compatibility
Windows 7, 8, 8.1, 10
Windows Server 2003, 2008 R2, 2012, 2012 R2, 2016
Linux 2.4.x to 2.6.x <i>LTS Versions only</i>
Microsoft WHQL Certified
Yes
Special Notes /
Requirements
Note
Selectable power output on pin 9 of the serial port
Environmental
Operating Temperature
-10C to 80C (14F to 176F)
Storage Temperature
-20C to 100C (-4F to 212F)
Humidity
5~85% RH
Physical
Characteristics
Material
Steel
Cable Length
11.8 in [30 cm]
Product Length
2.5 in [63.0 mm]
Product Width
3.0 in [75.0 mm]
Product Height
0.7 in [18.0 mm]
Weight of Product
9.3 oz [264.0 g]
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Packaging
Information
Package Length
5.9 in [14.9 cm]
Package Width
8.4 in [21.3 cm]
Package Height
2.0 in [51.0 mm]
Shipping (Package)
Weight
13.1 oz [370.0 g]
What's in the
Box
Included in Package
4-Port Low Profile Serial Card
12 in [30 cm] 4-Port DB44 to DB9 Break-out Cable
Full Profile Bracket
Quick-Start Guide
Low Profile Bracket (Installed)
*Product appearance and specifications are subject to change without notice.
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