StarTech.com 2S1P PCIe Parallel Serial Combo 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.

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.

Backed by a StarTech.com Lifetime warranty and free lifetime technical support.

• Selectable power output on pin 9 for the serial port
• 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
• One parallel port with data transfer rate up to 1.5 Mbps
• Two high speed RS232 serial ports with data transfer rate up to 460.8 Kbps