Skip to main content
Show Category menu
In Stock. Can Ship Today- Details

StarTech PCI Express to 2 Port DB9 RS232 Serial Adapter Card

Save $17.40 off RRP

Genuine NZ new item

Find out more...

Today's Price:

$97.57incl gst

Free Delivery

In Stock. Can Ship Today- Details

Estimated Delivery Time

  • Auckland
    1 Day
  • North Island
    1-2 Days
  • South Island
    1-3 Days

Product Description:

Special Product Offer:

Receive an additional 7% discount on any Startech quote when requesting a minimum of 5 units for Government & Public Sector Agencies/Organisations. Please state your organisation details when requesting a quote from our team. T&C apply.

StarTech PCI Express to 2 Port DB9 RS232 Serial Adapter Card

The PEX2S553 PCI Express serial card lets you turn a PCI Express slot into 2 RS232 (DB9) serial ports. Based on a native single chip design (no bridge chip), this 2-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe), and reducing the load applied to the CPU by as much as 48% over conventional serial cards. The RS232 Serial Adapter Card (PEX2S553) is compatible with a broad range of operating systems including Windows 2000/XP/2003/Vista/Windows 7/Server 2008 R2 (32 and 64 bit), Linux Kernel 2.6.11 to 4.11.x, and MAC OS 10.4 and above.


• Two high speed RS232 serial ports with support for data transfer rates up to 460.8 Kbps
• Compliant with PCI Express base specifications revision 1.0a
• Includes half-height/low profile mounting bracket


• Bus Type: PCI Express
• Card Type: Standard Profile (LP bracket incl.)
• Chipset ID: ASIX - MCS9922CV-AA
• Interface: Serial
• Port Style: Integrated on Card
• Ports: 2

• FIFO: 128 Bytes
• Max Baud Rate: 460.8 Kbps
• Serial Protocol: RS-232

• Connector Type(s): 1x PCI Express x1 Male
• External Ports: 2x DB-9 (9 pin, D-Sub) Male
• Internal Ports: 1x LP4 (4 pin; Molex-type Large Drive Power) Male

• 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)

Physical Characteristics:
• Color: Green
• Product Height: 20 mm
• Product Length: 105 mm
• Product Weight: 61 g
• Product Width: 120 mm


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 003, 2008 R2, 2012, 2012 R2, 2016
• Mac OS 10.4 to 10.10
• Linux 2.6.x to 4.11.x LTS Versions only

• Selectable power output on pin 9 of the serial port

Package Contents:

• 1x 2 Port PCI-Express Serial Card
• 2x Low Profile Brackets
• 1x Driver CD
• 1x Instruction Manual

Questions & Answers

Have a technical question about this product?

Ask us a question

Additional Details:

  • Stock Availability: 5 In Stock Now
  • Warranty: 2 Years
  • Manufacturer: StarTech Shop
  • Product Found In: Add On Cards
  • Model Number: PEX2S553
  • Part Number: T42365