EXSYS EX-3673 2-Port RS-232 PCI Express Serial Interface Card

Add two RS-232 serial ports to a desktop computer through a PCI Express x1 slot. The EX-3673 is used in industrial PCs, point-of-sale systems, and legacy equipment setups where serial devices such as barcode scanners, receipt printers, or CNC machines must be connected. The card fits standard and low-profile cases.

Key specifications

• Host interface: PCI Express x1
• Output interface: RS-232
• Serial ports quantity: 2
• Serial interface type: DB9
• Chipset: ASIX AX99100
• Baud rate: 921.6 Kbps
• FIFO buffer: 256-byte per port
• Data bits: 5, 6, 7, 8
• Stop bits: 1, 1.5, 2
• Flow control: hardware and software
• ESD protection: 15KV
• Operating systems: Windows 11/10/8.1/8/7/Vista/XP, Windows Server, Linux

Why choose it

The ASIX AX99100 chipset ensures reliable serial communication with a maximum data rate of 921.6 Kbps per port. A 256-byte FIFO buffer reduces CPU load during high-speed transfers. The card works in any PCI Express slot from x1 to x16, and the included low-profile bracket allows installation in slim desktops.

Ideal use cases

• Connecting legacy serial devices to modern computers
• Industrial automation and control systems
• Point-of-sale terminals with serial peripherals
• Embedded systems and test equipment

Good to know

The card supports hardware flow control (RTS/CTS, DTR/DSR) and software flow control (XON/XOFF). Parity options include even, odd, none, mark, and space. It is plug-and-play compatible with Windows and Linux operating systems.