2 Port PCI RS232 Serial Adapter Card - Dual Voltage 16950 UART (PCI2S950DV) StarTech.com

This is a PCI expansion card designed to add two RS232 serial ports to a computer system. It is ideal for users who need to connect legacy serial devices such as industrial equipment, modems, or older peripherals that do not support modern USB or other interfaces. The card supports dual voltage, making it compatible with both 3.3V and 5.0V PCI slots, ensuring it works in a wide range of systems. It includes both standard and low-profile brackets for installation in different computer cases, offering flexibility for various form factors.

The card features two high-performance 16C950 UART channels, which provide reliable communication with a maximum data transfer rate of 460 Kbps. Each channel has a 128-byte deep FIFO buffer for the transmitter and receiver, reducing the need for frequent interrupts and improving overall performance. It is compliant with PCI 3.0 and Power Management 1.1 standards, ensuring compatibility with modern motherboards and efficient power usage when idle.

The card supports both in-band and out-of-band flow control methods. Automated in-band software flow control uses programmable Xon/Xoff signals in both directions, while automated out-of-band hardware flow control utilizes RTS/CTS and DSR/DTR signals. These features help maintain stable data transmission and prevent buffer overflows or underflows during high-speed transfers.

Installation requires a free PCI slot and basic knowledge of opening a computer case and securing the card. The package includes the adapter card, standard and low-profile brackets, and necessary mounting hardware. No additional drivers are typically required as the card is plug-and-play compatible with most operating systems.

Brand: StarTech.com
Model: PCI2S950DV
Specifications: Dual Voltage (3.3V/5.0V), PCI 3.0 compliant, 2 x 16C950 UART channels, 460 Kbps data rate, 128-byte FIFO buffers
Features: Dual profile bracket, automated flow control, power management support