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Shopping Cart 4 Port PCI Express Serial Card w/ Breakout Cable - Add 4 RS232 serial ports to any PC using a single PCI Express expansion slot - pci express serial card - pci-e serial card - pci express RS232 - rs232 card - pci serial adapter 4 Port PCI Express Serial Card w/ Breakout Cable STCPEX4S553B
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Item #: STCPEX4S553B
  • Native single chip design
  • Includes a full profile and low profile/half-height bracket
  • On chip 256-byte depth FIFO in transmit/receive path of each port
  • Single-Lane (x1) PCI-Express with throughput up to 2.5Gbps
  • Supports hardware and software flow control
Ships via UPS
  • Allow 10 days for delivery
  • Ships direct from Manufacturer
Product Information

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.

General Information
Manufacturer Part NumberPEX4S553B
Manufacturer Website Address
Product Name4 Port RS232 PCI Express Serial Card w/ Breakout Cable
Product TypeMultiport Serial Adapter

Technical Information

Host InterfacePCI Express x1
Maximum Data Transfer Rate1.95 Mbit/s
Platform Supported
  • PC
  • Mac
  • Linux


Ports Expandability4 x DB-9 RS-232 - Serial, Via Cable

Physical Characteristics

Form FactorPlug-in Card
Weight (Approximate)8.40 oz


Package Contents
  • 4 Port RS232 PCI Express Serial Card w/ Breakout Cable
  • 1 x DB9 Breakout Cable
  • 1 x Full Profile Bracket
  • 1 x Driver CD
  • 1 x Instruction Manual
System Requirements

OS Compatibility:

  • Windows® 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, 2019
  • Mac OS® 10.4 to 10.10
  • Linux 3.5.x to 4.11.x LTS Versions Only
Environmentally FriendlyYes
Environmental Certification
  • RoHS
  • WEEE
Country of OriginChina
TAA CompliantYes
Packaged Quantity1
Quantity Per Selling Unit1
Special OrderY


Limited WarrantyLifetime


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