StarTech.com 4 Port PCI Express Serial Card w/ Breakout Cable – Add 4 RS232 serial ports to any PC using a single PCI Express expansion slot – pci express serial card – pci-e serial card – pci express RS232 – rs232 card – pci serial adapter CARD W/ 16550 UART – 4PORT
The PEX4S553B 4-Port PCI Express Serial Card (with breakout cable) lets you add 4 RS232 serial ports using a single PCIe expansion slot, with an included 1-to-4 cable enabling you to add 4 serial ports to a single low profile slot. The serial card features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards – a cost-effective solution for connecting legacy serial devices to PCIe-enabled computers. The multi-port serial adapter includes both full profile and low profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows®, Linux, and MAC OS. This product is a replacement for our PEX4S552B card. Backed by a StarTech.com lifetime warranty and free lifetime technical support. More from the Manufacturer

Startech PEX4S553B

Features

Native single chip design

Includes a full profile and low profile/half-height bracket

On chip 256-byte depth FIFO in transmit/receive path of each port

Single-Lane (x1) PCI-Express with throughput up to 2.5Gbps

Supports hardware and software flow control

Supports data transfer rates up to 250Kbps on each port

Compliant with PCI Express base specifications revision 1.0a

Automated out-of-band flow control using CTS/RTS and DSR/DTR

Guides & Documents

Brochure

Manual