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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.

Maximum Compatibility

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.

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 921.6Kbps
• 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

The Choice of IT Pros Since 1985

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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Connector(s)
Connector Type(s)	PCI Express x1 Male
External Ports	DB-9 (9 pin, D-Sub) Male
Internal Ports	LP4 (4 pin; Large Drive Power) Male Input
Environmental
Humidity	5~85% RH
Operating Temperature	-10°C to 80°C (14°F to 176°F)
Storage Temperature	-20°C to 100°C (-4°F to 212°F)
Hardware
Bus Type	PCI Express
Card Type	Standard Profile (LP bracket incl.)
Chipset ID	Asix AX99100
Interface	Serial
Port Style	Integrated on Card
Ports	4
Packaging Information
Package Height	51 mm [2 in]
Package Length	149 mm [5.9 in]
Package Width	213 mm [8.4 in]
Shipping (Package) Weight	370 g [13.1 oz]
Performance
Data Bits	5, 6, 7, 8, 9
FIFO	256 Bytes
Flow Control	None, Xon/Xoff, RTS/CTS
Max Baud Rate	921.6 Kbps
MTBF	214,358 hours
Parity	None, Odd, Even, Space, Mark
Serial Protocol	RS-232
Stop Bits	1, 1.5, 2
Physical Characteristics
Cable Length	30 cm [11.8 in]
Product Height	1.8 cm [0.7 in]
Product Length	6.3 cm [2.5 in]
Product Width	7.5 cm [3 in]
Weight of Product	264 g [9.3 oz]
Prominence
Description CDW 75 - 1st Line	StarTech.com 4-port PCI Express RS232 Serial Adapter Card - PCIe Serial DB9
Software
Microsoft WHQL Certified	Yes
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 LTS Versions only
Special Notes / Requirements
Note	Selectable power output on pin 9 of the serial port
What's in the Box
Included in Package	4-Port DB9 Break-out Cable
	4-Port Low Profile Serial Card
	Full Profile Bracket
	Quick-Start Guide

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4 port DB9 serial controller card w/16950 UART using ASIX AX99100 w/bi-directional RS232 speeds up to 921.6Kbps per port; avail. 256 byte FIFO and 9th data bit | Upgraded version of our popular card PEX4S952LP
Expansion card pre-installed w/low profile bracket (standard bracket incl); DB44 to 4x DB9 breakout cable incl.
Lifetime warranty
PCI Express RS232 serial adapter card w/power output of 12v/5v/none on DB9 pin 9 w/up to 2A
Use in PLCs/automation/scanner
Windows XP and up/Linux