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StarTech 4 Port PCI Express Serial Card
SKU# AB64917, Model# PEX4S553B

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SKU # AB64917 | Model # PEX4S553B | Brand StarTech

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StarTech 4 Port RS232 PCI Express Serial Card with Breakout Cable

Manufacturer Warranty: Limited Product Lifetime Warranty
Manufacturer Contact Info:,
Rating: 3.0 stars - 1 reviews

The PEX4S553B 4-Port PCI Express Serial Card (with breakout cable) lets you add 4 RS232 serial ports using a single PCIe expansion slot, with an included 1-to-4 cable enabling you to add 4 serial ports to a single low profile slot.

The serial card features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards - a cost-effective solution for connecting legacy serial devices to PCIe-enabled computers.

The multi-port serial adapter includes both full profile and low profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows®, Linux, and MAC OS.

This product is a replacement for our PEX4S552B card.

Backed by a lifetime warranty and free lifetime technical support.

Data Bits5, 6, 7, 8
FIFO256 Bytes
Max Baud Rate230.4 Kbps
ParityEven, Odd, None, Space and Mark
Serial ProtocolRS-232
Physical Characteristics
Product Height68.5 mm [2.7 in]
Product Length80.5 mm [3.2 in]
Product Weight50 g [1.8 oz]
Product Width12 mm [0.5 in]
Microsoft WHQL CertifiedYes
OS CompatibilityWindows® DOS, 95, 98SE, 2000, CE 5.0/6.0, Embedded System 2009, POS Ready 2009, XP Embedded, XP, Vista, 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
Mac OS® 10.4 to 10.10
Linux 3.5.x to 4.11.x LTS Versions Only
What's in the Box
Included in Package4 Port PCI-Express Serial Card
Breakout cable
Driver CD
Full profile bracket
Instruction Manual
Packaging Information
Shipping (Package) Weight0.3 kg [0.7 lb]
Port StyleDongle (Included)
Chipset IDASIX - MCS9904CV-AA
Card TypeLow Profile (SP bracket incl.)
Bus TypePCI Express
Storage Temperature-40°C to 85°C (-40°F to 185°F)
Operating Temperature0°C to 70°C (32°F to 158°F)
Humidity5~85% RH
External PortsDB-9 (9 pin, D-Sub) Male
Connector Type(s)PCI Express x1 Male

SKU # AB64917 | Model # PEX4S553B

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