StarTech 2 Port PCIe RS232 Serial Adapter Card

Product Overview 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 and up, and MAC OS 10.4 and above.

Plus, the serial card includes an optional half-height/low profile bracket that allows the card to be installed in any PCI Express slot, regardless of the size of the computer case. Features • 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
• Selectable power output on pin 9 for the serial port
• 128-byte deep FIFO per transmitter and receiver
• Native single-Chip, single lane PCI Express
• Automated out-of-band flow control using CTS/RTS and DSR/DTR
• Automated in-band software flow control using programmable Xon/Xoff in both directions

Connector(s)
Connector Type(s)	PCI Express x1 Male
External Ports	DB-9 (9 pin; D-Sub) Male
Internal Ports	LP4 (4 pin; Molex Large Drive Power) Male
Environmental
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)
Hardware
Bus Type	PCI Express
Card Type	Standard Profile (LP bracket incl.)
Chipset ID	ASIX/MosChip - MCS9922CV-AA
Interface	Serial
Port Style	Integrated on Card
Ports	2
Package Contents
Included in Package	2 Port PCI-Express Serial Card
	Driver CD
	Instruction Manual
	Low Profile Brackets
Packaging Information
Shipping (Package) Weight	0.2 kg [0.4 lb]
Performance
FIFO	128 Bytes
Max Baud Rate	460.8 Kbps
Serial Protocol	RS-232
Physical Characteristics
Color	Green
Product Height	20 mm [0.8 in]
Product Length	105 mm [4.1 in]
Product Weight	63.5 g [2.2 oz]
Product Width	120 mm [4.7 in]
Software
OS Compatibility	Windows® 8 / 8.1 (32/64bit), 7 (32/64), Vista (32/64), XP (32/64), XP Embedded, POS Ready 2009, Embedded System 2009, CE 5.0/6.0, 2000, 98SE, 95, DOS Windows Server® 2012, 2008 R2, 2003 Mac OS® 10.4 and up (Tested up to 10.10) Linux kernel 2.6.x
Special Notes / Requirements
Note	Selectable power output on pin 9 of the serial port