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StarTech.com StarTech.com 2S1P PCIe Parallel Serial Combo Card

$59.99

The PEX2S5531P 2S1P PCI Express Card turns a PCI Express slot into two RS232 (DB9) serial ports and one Parallel port. The adapter card features a native PCI Express single chip design that allows you to take advantage of full PCI Express capability, providing improved speed and reliability while reducing the load applied to the CPU by as much as 48% over conventional serial cards which use a bridge chip design.

Compatible with a broad range of operating systems including Windows® 2000/XP/2003/Vista™/Windows 7/Server 2008 R2 (32 and 64-bit), Linux Kernel 2.6.11 and up, and MAC OS 10.4, this 2 Port Serial 1 Port Parallel PCI-Express Card also features an optional low profile/half-height bracket that allows the card to be installed in virtually any computer case, regardless of the case form factor.

This product is a replacement for our PEX2S5521P card.

Backed by a StarTech.com 2-year warranty and free lifetime technical support.

More from the Manufacturer


  • Automated in-band flow control using programmable Xon/Xoff in both directions
  • Automated out-of-band flow control using CTS/RTS and DSR/DTR
  • Native single-chip, single lane PCI Express
  • Selectable power output on pin 9 for the serial port
  • Configurable in 5V, 12V, and RI (non-powered) modes
  • 128-byte deep FIFO per transmitter and receiver
  • One parallel port with data transfer rate up to 1.5 Mbps
  • Compliant with PCI Express base specifications revision 1.0a
  • Two high speed RS232 serial ports with data transfer rate up to 460.8 Kbps

StarTech.com USB to Serial Adapter Hub – 8 Port – Industrial – Wall Mount – Din Rail – COM Port Retention – FTDI USB to RS232

$245.99

The ICUSB2328I Industrial 8-Port USB to Serial Hub with DIN Rail Clips converts a single USB port into eight RS232 serial ports, enabling you to connect to, monitor and control your serial devices.

Featuring rugged metal construction, with sturdy wall-mounting brackets and top-hat DIN Rail clips (included), this 8 port USB to RS232 Serial Hub provides versatile mounting options and a robust solution for both harsh industrial environments and simple desktop installations.

This USB powered adapter also retains assigned serial COM port values once connected, allowing the same values to be automatically reassigned to the USB serial hub ports.

Backed by a StarTech.com 2-year warranty and free lifetime technical support.

More from the Manufacturer


  • Powered by an available USB port - no external power adapter required
  • Baud Rate up to 921.6 Kbps
  • COM Retention: COM Port assignments maintained across reboot
  • Wall-mountable, and includes DIN Rail clips
  • Rugged metal construction
  • USB to 8-Port Straight-Through RS232 Serial Adapter

SYBA Multimedia 1-port Serial Adapter

$27.35

Based on one of the best known Serial chipset MSC9901 for best performance. Ideal for connecting to modem, cellular phone, PDA, ISDN terminal adapter, satellite receiver, graphic tablet, bar code scanner, label printer, automated teller machine, GPS, finger print identification, Infra-Red transceiver, packet radio, magnetic card reader, Pos devices, multi-modem dail-up server, digital camera, automation interface, and card reader. Keeps old Serial devices alive.

StarTech.com 2-port PCI Express RS232 Serial Adapter Card – PCIe Serial DB9 Controller Card 16950 UART – Low Profile – Windows and Linux

$75.99

This RS232 Serial Adapter Card lets you add two RS232 (DB9) serial ports 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 921.4Kbps.

Maximum Compatibility

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.

Experience Optimal Technology

This PCIe to serial adapter supports the following features:

  • Compatible with industry standard 16950 UART
  • Supports max baud rate of up-to 921.4Kbps
  • Provides 5/12V power output on Pin 9 when external power is connected
  • 256-byte depth FIFO per transmitter and receiver
  • Supports 9, 8, 7, 6, 5 data bits
  • Asix AX99100 chipset
  • PCI Express 1.1 compliant

PEX2S953LP is backed by a StarTech.com lifetime warranty and free lifetime technical support.


  • 2 PORT SERIAL CARD: Serial controller card w/16950 UART based on ASIX AX99100, allows 2x DB9 ports w/bi-directional RS232 speeds up to 921.6Kbps per port, available 256 byte FIFO buffer & 9th data bit
  • OPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2A total; Each of the 2 ports are individually configurable
  • LOW PROFILE BRACKETS PRE-INSTALLED: PCIe multiport serial card comes w/ a low profile bracket preinstalled & a full profile bracket is incl for versatile install; supports Windows XP and up & Linux
  • VERSATILE APPLICATIONS: For standard/low profile desktop/servers w/ uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope
  • STARTECH.COM ADVANTAGE: IT professionals choice for over 30 years; PCIe RS232 Serial expansion card is backed for life by StarTech.com, incl. free 24/5 North America based multi-lingual tech support