EXSYS EX-44081 PCIe 1-Port RS-232 Serial Card, ASIX AX99100, Low Profile

Many modern computers lack native RS-232 serial ports, making it difficult to connect legacy devices such as industrial machinery, point-of-sale terminals, or laboratory instruments. The EXSYS EX-44081 solves this by adding a single high-performance RS-232 port through a PCI Express x1 slot, ensuring reliable communication with older equipment.

Who is it for

This card is ideal for system integrators, IT administrators, and technicians who need to connect serial devices to modern desktops or servers. It suits industrial automation, retail, healthcare, and scientific environments where legacy serial peripherals are still in use.

Main features

• One RS-232 serial port via a standard DB9 male connector
• ASIX AX99100 chipset for stable, high-speed data transfer up to 921.6 Kbps
• 256-byte FIFO buffer per port reduces CPU load and prevents data loss
• Supports hardware (RTS/CTS) and software (XON/XOFF) flow control
• Compliant with PCI Express Base Specification 2.0, works in x1, x4, x8, x16 slots
• Includes both standard and low-profile brackets for flexible installation
• ESD protection up to 15KV on serial signals for enhanced reliability

Specifications

• Host interface: PCIe x1
• Output interface: RS-232
• Serial ports quantity: 1
• Serial interface type: DB9
• Chipset: ASIX AX99100
• Baud rate: 921.6 Kbps
• FIFO buffer: 256-byte
• Flow control: Hardware (RTS/CTS), Software (XON/XOFF)
• Expansion card standard: PCIe 2.0
• Operating temperature: 0°C to 70°C
• Supported operating systems: Windows XP/Vista/7/8/10/11, Server 2003/2008/2012/2016/2019/2022, Linux kernel 2.6.x and higher

Tips

Check the available PCIe slot length before purchase; the card fits x1 and larger slots. For low-profile cases, use the included low-profile bracket. Install the latest driver from the EXSYS website for optimal performance.