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16-Port Low-Profile Serial Card - RS232 - PCI Express

Product ID: PEX16S550LP

Add 16 RS232 serial ports (DB9) to your low or full-profile computer, through a PCI Express slot

  • 16 DB9 RS232 ports from a single PCIe slot

  • Enables high-speed serial communication with data transfer rates up to 921.6 Kbps

  • Compatible with low- and full-profile desktop computers or servers

More Features . . .
  • Fully compliant with PCI Express 1.0a/1.1 specification, compatible with 1x, 2x, 4x, 8x, and 16x PCIe bus

  • +/-15kV ESD protection

  • Selectable power output (5V or 12V ) on pin 9 for the serial port

  • Data Bits: 5, 6, 7, or 8-bit characters

  • Windows and Linux support

Prices may be lower from Resellers:



Available in
$390.99 USD


In stock: ?
USA: 56  |  Canada: 27

We will transfer stock to fulfill your order at no extra cost. If the quantity shown for our US warehouse isn’t enough to fulfill your order, we will transfer the required stock from our Canadian warehouse.

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This PCI Express serial card adds 16 high-speed RS232 ports to your standard or low-profile desktop or server PC. This lets you maximize the number of available DB9 RS232 ports that are available for connecting your serial-based devices and equipment, while using only a single PCI Express (PCIe) slot. It’s the perfect solution for adding the serial ports you need, even if your desktop PC or server only has a limited number of PCIe expansion slots.

Add 16 RS232 ports through one PCIe slot

You can install the serial card to add 16 high-performance DB9 RS232 serial ports from a single PCIe slot. With two breakout cables of 8 ports each, the PCIe serial card maximizes the density of DB9 RS232 ports on a server or desktop computer. It’s ideal for system upgrades in a wide range of applications, including manufacturing equipment, POS equipment, security devices such as surveillance cameras, and environment or building control systems.

The serial card is compliant with PCI Express 1.0a specification, and it's compatible with 1x, 2x, 4x, 8x and 16x PCI Express slots.

High-speed serial communication

The PCIe serial card delivers high-performance, high-speed serial communication, with support for data transfer rates of up to 921.6 Kbps. 

Easy installation

The serial card is easy to install and configure, and compatible with a broad range of Windows® and Linux® operating systems. The card features IRQ sharing and supports plug-and-play serial device connections, which makes it convenient and easy to connect serial devices. It includes a low-profile bracket making it compatible with both full profile and low profile PC chassis slots.

The PEX16S550LP is backed by a lifetime warranty and free lifetime technical support.

Common Customer Questions

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Compatible With

View full OS compatibility

Windows® 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
Linux 2.6x to 4.2x LTS Versions only

  • Control/monitoring of surveillance/security cameras and systems
  • Industrial automation for factory/manufacturing floors
  • Self-service automated machines and kiosks (in customer-facing areas such as grocery stores or airports) to control serial devices such as scales, touchscreens, magnetic card readers, bar code scanners, receipt printers, label printers
  • POS applications to control keyboards, cash drawers, receipt printers, card readers/card swipes, scales, and elevated displays on poles
  • Bank teller workstations in either full-profile or low-profile versions to control their serial devices such as cash drawers, card readers/card swipes, printers, keypads/PIN pads, pen pads
Product Numbers
Warranty Information
Warranty 2 Years
Bus Type PCI Express
Card Type Low Profile (SP bracket incl.)
Chipset ID ASMedia - ASM1083
SystemBase - SB4002A
SystemBase - SB16C1058
Industry Standards PCI Express 1.1, PCI Power Management 1.2
Interface Serial
Ports 16
Data Bits 5, 6, 7, 8
Max Baud Rate 921.6 Kbps
Serial Protocol RS-232
Stop Bits 1, 1.5, 2
Connector Type(s) 1 - PCI Express x1 Male
External Ports 16 - DB-9 (9 pin, D-Sub) Male
Internal Ports 1 - SP4 (4 pin, Small Drive Power) Male
OS Compatibility Windows® 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
Linux 2.6x to 4.2x LTS Versions only
Humidity 10~90% RH
Operating Temperature 0°C to 55°C (32°F to 131°F)
Storage Temperature -20°C to 75°C (-4°F to 167°F)
Physical Characteristics
Color Yellow
Product Height 0.9 in [22 mm]
Product Length 6.6 in [167.7 mm]
Product Weight 2.5 oz [70 g]
Product Width 2.7 in [68 mm]
Packaging Information
Shipping (Package) Weight 40.6 oz [1150 g]
What's in the Box
Included in Package 1 - serial card
1 - low-profile bracket
2 - breakout cables
1 - driver CD
1 - quick-start guide
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