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PCIe x1 AX99100 4-port RS232 Serial Adapter Card with DB44 to DB9 Break-out Cable

  • Product Code: PX1-4S-9100B
  • Availability: In Stock
  • Ships: Typically within 3 Business Days
  • Guarantee: 30-day Return and Money Back


This RS232 Serial Adapter Card lets you add four RS232 DB9 serial port to your computer through a PCI Express (PCIe) slot. It enables you to interact with serial devices such as card readers, printers, PIN pads, and modems, at speeds of up to 115200bps.

With broad OS support, including for Windows and Linux, this PCI Express card is easy to integrate into mixed environments. The card comes pre-configured with a low-profile bracket, and includes an optional full-profile bracket, so installation is easy regardless of the case form factor.


  • Compliant with PCI Express 2.0 Gen 1
  • Compliant with PCI Power Management 1.2 
  • Single-lane (X1) PCI Express End-point Controller with PHY integrated
  • Supports both legacy and MSI Interrupts
  • Supports ASPM Power Management
  • Quad 16950 UARTs, Supports RS-232 
  • Bi-directional speeds up to 25 Mbps per port Full Serial Modem Control 
  • Supports Hardware, Software Flow Control  
  • Supports 5, 6, 7, 8 and 9-bit Serial format 
  • Supports Even, Odd, None, Space and Mark parity
  • Supports On Chip 256 Byte depth FIFOs in Transmit, Receive path of each Serial Port 
  • Supports remote wakeup and power management features
  • Serial Port transceiver shutdown support 
  • Supports Slow IrDA mode (up to 115200bps) on all Serial Ports
  • Supports multi-drop application for 9-bit mode
  • Provides RS-232 serial ports with +5 or +12 VDC power output via COM 1st or 9th pin
  • Supports DMA burst transfer
  • Operating temperature range: 0 to 70°C or -40 to +85°C (option)
  • Support special baud rate (option)


  • Chipset: ASIX AX99100
  • Bus Interface: PCI Express 2.0 Gen 1
  • Connectors: 4 x DB9 Serial port
  • FIFO: 256 Byte
  • UART: 16950
  • Data rate: up to 115200bps
  • Function
    • Supports DMA burst transfer
    • Supports remote wakeup and power management features
    • Bi-directional speeds up to 25 Mbps per port Full Serial Modem Control
  • OS Compatibility
    • Windows® 7, 8, 8.1, 10
    • Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
    • Linux 2.4.x to 2.6.x LTS Versions only
  • Environmental conditions:
    • Operating temperature: 32° to 122° F (0° to 50° C)
    • Operating humidty: 20% to 80% RH
    • Storage temperature: -4° to 140° F (-20° to 60° C)
    • Storage humidity: 10% to 90% RH
  • Certifications/Standards: FCC, CE, RoHS

Package Contents

  • AX99100 4S PCIe Serial Card
  • Low Profile Bracket
  • User Manual
  • Driver CD

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