EXSYS EX-3683 PCI Express Dual Port RS232 Serial Adapter Card with Low Profile Bracket

The EXSYS EX-3683 stands out by offering two native RS232 serial ports on a single PCI Express x1 card, a configuration that many modern systems lack entirely. Built around the ASIX AX99100 controller, it delivers true hardware serial connectivity without the compatibility issues often found with USB-to-serial converters. Each port supports data rates up to 921.6 Kbps, making it suitable for industrial equipment, point-of-sale terminals, and legacy peripherals that demand reliable, low-latency communication.

Highlights

• Dual RS232 DB9 male ports via PCI Express x1 interface
• High-speed data transfer up to 921.6 Kbps per port
• 256-byte FIFO buffer per port reduces CPU overhead
• 15KV ESD protection safeguards against electrical surges
• Includes both standard and low-profile brackets for flexible installation
• Broad OS support: Windows, Linux, and macOS

In daily use

Installation is straightforward: insert the card into an available PCIe x1 slot, secure the appropriate bracket, and install the driver for your operating system. Once configured, the two serial ports appear as standard COM ports, allowing legacy software to communicate without modification. The card's hardware flow control (RTS/CTS) and software flow control (XON/XOFF) ensure reliable data exchange even with older devices. The 15KV ESD protection is particularly valuable in industrial environments where static discharge is common.

Full specifications

• Interface: PCI Express 2.0 x1
• Controller: ASIX AX99100
• Ports: 2 x RS232, DB9 male
• Max data rate: 921.6 Kbps per port
• FIFO buffer: 256-byte per port
• Data bits: 5, 6, 7, 8
• Parity: Even, Odd, None, Mark, Space
• Stop bits: 1, 1.5, 2
• Flow control: Hardware (RTS/CTS), Software (XON/XOFF)
• ESD protection: 15KV
• Operating temperature: 0°C to 70°C
• OS support: Windows XP/Vista/7/8/10/11, Windows Server, Linux, macOS
• Low profile bracket included

Final note

The EXSYS EX-3683 is a dependable solution for adding native serial ports to modern computers, ensuring compatibility with a wide range of industrial and legacy equipment.