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

StarTech 2 Port RS232 Serial + 1 Port Parallel PCI Express Adapter Card

Save $15.60 off RRP

Genuine NZ new item

Find out more...

Today's Price:

$90.22incl gst

Free Delivery

Low 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 2 Port RS232 Serial + 1 Port Parallel PCI Express Adapter Card

The PEX2S5531P 2S1P PCI Express Card turns a PCI Express slot into two RS232 (DB9) serial ports and one Parallel port. The adapter card features a native PCI Express single chip design that allows you to take advantage of full PCI Express capability, providing improved speed and reliability while reducing the load applied to the CPU by as much as 48% over conventional serial cards which use a bridge chip design.


• Two high speed RS232 serial ports with data transfer rate up to 460.8 Kbps
• One parallel port with data transfer rate up to 1.5 Mbps
• Compliant with PCI Express base specifications revision 1.0a
• 128-byte deep FIFO per transmitter and receiver
• Configurable in 5V, 12V, and RI (non-powered) modes
• Selectable power output on pin 9 for the serial port
• Native single-chip, single lane PCI Express
• Automated out-of-band flow control using CTS/RTS and DSR/DTR
• Automated in-band flow control using programmable Xon/Xoff in both directions


• Bus Type: PCI Express
• Card Type: Standard Profile (LP bracket incl.)
• Chipset ID: ASIX - MCS9901CV-CC
• Industry Standards: IEEE 1284, PCI Express base specifications revision 1.0a
• Interface: Parallel, Serial
• Port Style: Integrated on Card
• Ports: 2

• FIFO: 128 Bytes
• Max Baud Rate: 460.8 Kbps
• Maximum Data Transfer Rate: RS-232 - 460.8Kbps, Parallel - 1.5Mbps
• Serial Protocol: RS-232
• Supported Protocols: EPP, ECP, SPP, PS/2

• Connector Type(s): 1 - PCI Express x1 Male
• External Ports: 1 - DB-25 (25 pin, D-Sub) Female, 2 - DB-9 (9 pin, D-Sub) Male
• Internal Ports: 1 - LP4 (4 pin; 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:
• Product Height: 2 cm
• Product Length: 10.5 cm
• Product Width: 12 cm
• Weight of Product: 112 g
• Color: Green
• Material: Steel

• Input Voltage: 12V DC
• Output Voltage: 12V DC


OS Compatibility:
• Windows DOS, 95, 98SE, 2000, POS Ready 2009, Embedded System 2009, CE 5.0/6.0, XP Embedded, 2000, XP, Vista, 7, 8, 8.1, 10, 11
• Windows Server 2003, 2008 R2, 2012, 2012 R2, 2016, 2019, 2022
• Mac OS X 10.4 to 10.9
• Linux 3.5.x and up - LTS Versions only

• Selectable power output on pin 9 of the serial port

Package Contents:

• 1x 2 Port PCI-Express Serial Card
• 1x Parallel port (with ribbon cable)
• 3x 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: 1 In Stock Now
  • Warranty: 2 Years
  • Manufacturer: StarTech Shop
  • Product Found In: Add On Cards
  • Model Number: PEX2S5531P
  • Part Number: DD011861