StarTech 2S1P PCI-E ParallelSerial Card PEX2S5531P


StarTech 2S1P Native PCI-Express Parallel Serial Combo Card with 1655 Retail PEX2S5531P

  • 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

Regular Stock. Please contact our sales at 780-481-8855 to get current availability. Holds limited to 24 hours maximum.

SKU: CT1ST1CT3001 Category: Tag:


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.

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 and up, and MAC OS 10.4, this 2 Port Serial 1 Port Parallel PCI-Express Card also features an optional low profile/half-height bracket that allows the card to be installed in virtually any computer case, regardless of the case form factor.

This product is a replacement for our PEX2S5521P card.

Technical Specifications

Warranty 2 Years
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
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
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
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016, 2019
Mac OS X® 10.4 to 10.9
Linux 3.5.x to 4.11.x LTS Versions only
Note Selectable power output on pin 9 of the serial port
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)
Product Height 0.8 in [2 cm]
Product Length 4.1 in [10.5 cm]
Product Width 4.7 in [12 cm]
Weight of Product 4 oz [112 g]
Package Height 1.2 in [31 mm]
Package Length 6.9 in [17.4 cm]
Package Width 5.7 in [14.5 cm]
Shipping (Package) Weight 7.3 oz [208 g]
Included in Package 1 – 2 Port PCI-Express Serial Card
1 – Parallel port (with ribbon cable)
3 – Low Profile Brackets
1 – Driver CD
1 – Instruction Manual

Additional information

Weight 2 lbs
Dimensions 5 × 5 × 5 in