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2S1P PCI Express Serial Parallel Combo Card with Breakout Cable

Add a parallel port and two RS-232 serial ports to your PC through a PCI-Express expansion slot

Product ID: PEX2S1P552B

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  • Supports Re-map function for legacy ports (Supported OSs only)
  • Low-profile design with optional full profile bracket
  • Single-chip architecture

The PEX2S1P552B 2S1P PCI Express Serial Parallel Combo Card with Breakout Cable combines the functionality of a Parallel Card and a Serial Card, adding 2 RS232 serial ports and 1 parallel port to a single PCI-Express (PCIe) expansion slot.

A suitable addition to almost any computer, the card offers a low-profile design and includes an optional full height bracket. A single connector delivers individual parallel and serial connections using the included break-out cable, adding a total of 3 ports to your system while avoiding "crowded" connections that can occur with fixed/static connection ports. This RS232 serial adapter card also features compatibility with a broad range of operating systems, including DOS, Windows® 7/ Server 2008 R2/Vista/XP/Server2003/2000/98SE (32 and 64 bit), Linux and Mac OS X 10.4.

The adapter card features a native PCI Express single-chip design, providing improved speed and reliability while reducing the CPU load by as much as 48% over conventional (bridge chip) adapter cards.

Backed by a Lifetime warranty and free lifetime technical support.


  • Use your existing serial and parallel devices with PCI Express desktop PCs, overcoming a lack of legacy support
  • Healthcare (patient monitoring equipment, nurses' stations, modems)
  • Point-of-Sale (POS credit/debit card readers, receipt printers, bar code scanners, cash registers, scales)
  • Security (UPS control, access key panels, video cameras, card readers, modems)
  • Manufacturing (CNC machinery, process control equipment, bar code scanners, serial printers)
  • Connect parallel and serial devices like printers, scanners, ISDN terminal adapters, CD-R/RWs, Zip® drives and memory card readers
  • Environmental Control (lighting, temperature, clocks)
  • ISDN Networking
  • Hospitality/Restaurant (serial printers, bar code scanners, keyboard, mouse, receipt printer, credit/debit card reader)
  • Consumer (modems, PDAs, digital cameras, printers)
  • Entertainment (video lottery terminals, slot machines, gaming systems)

The Advantage

  • Break-out cable design with low and standard profile brackets for a versatile single slot solution to add 3 additional ports (2 serial, 1 parallel) to almost any system including space-sensitive embedded applications
  • Native single-chip design reduces CPU load for improved performance and reliability
  • Broad Operating System support including 64-bit Windows systems for easy integration into mixed environments

Partner Numbers

  • Ingram Micro Netherlands 1604830
  • UPC 065030835749


  • Windows 7 logo
  • Linux logo
DOS, Windows 95/ 98SE/ 2000/ XP(32/64bit)/ Server 2003(32/64bit)/ Vista(32/64bit)/ 7(32/64bit)/ Server 2008 R2, Linux, and Mac OS 10.4.x and up
Windows XP Embedded/ POS Ready 2009/ Embedded System 2009 OS/ CE 5.0/ CE 6.0


Warranty Information Warranty Lifetime
Connector(s) 1 - Connector Type(s) PCI Express x1
2 - External Ports DB-9 (9 pin, D-Sub)
1 - External Ports DB-25 (25 pin, D-Sub)
Hardware Ports 3
Bus Type PCI Express
Card Type Low Profile (SP bracket incl.)
Port Style Dongle (Included)
Industry Standards 16C450/16C550 UART
Chipset ID ASIX - MCS9901CV-CC
Packaging Information Package Length 17.7 cm [7.0 in]
Package Width 40 mm [1.6 in]
Package Height 14.5 cm [5.7 in]
Shipping (Package) Weight 680 g [24.0 oz]
Performance Maximum Data Transfer Rate 250 Kbps for Serial and 1.5 Mbps for Parallel
Serial Protocol RS-232
Data Bits 5, 6, 7, 8
FIFO 256 Byte
Flow Control Hardware, Software
Parity Even, Odd, None, Space, Mark
Physical Characteristics Product Length 68 mm [2.7 in]
Product Width 22 mm [0.9 in]
Product Height 61 mm [2.4 in]
Weight of Product 248.9 g [8.8 oz]
Software OS Compatibility DOS, Windows 95/ 98SE/ 2000/ XP(32/64bit)/ Server 2003(32/64bit)/ Vista(32/64bit)/ 7(32/64bit)/ Server 2008 R2, Linux, and Mac OS 10.4.x and up
Windows XP Embedded/ POS Ready 2009/ Embedded System 2009 OS/ CE 5.0/ CE 6.0
Microsoft WHQL Certified Yes
What's in the Box 1 - Included in Package PCIe 2S1P Card
Breakout Cable
Full profile bracket
Driver CD
User Manual



DB9 to DB25 Serial Cable Adapter - F/F

Convert a DB9 male port to a DB25 female port

Your price
€3.99 EUR

In stock: 174

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Frequently Asked Questions


When you troubleshoot issues with a serial device, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • Serial cables

  • Serial ports

  • Serial devices

To test your setup components, try the following:

  • Use the serial cable, serial port, and serial device in another setup to see if the problem is with the components or the setup.

  • Use a different serial cable, serial port, and serial device in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test your cables, it is recommended that you do the following:

  • Test each cable individually.

  • Use short cables when you are testing.

When you test the serial ports and serial device, it is recommended that you do the following:

  • Press the Windows key + R, type devmgmt.msc, and press Enter to open Device Manager. Check to see if your device is listed under Ports (COM & LPT).

  • Make sure that the COM port number is the correct number for the serial device and that the software being used to connect the computer to the serial device uses the correct COM port number. 

  • If the device is listed with an error, follow the instructions on the website to reinstall the drivers.

Note: Some serial devices work only if the COM port number is between a certain range. For example, COM1 to COM4.

To check whether or not an RS-232 serial port is working, perform an RS-232 loopback test by doing the following:

  1. If your serial port is not female, convert it by taking a female/female cable or gender changer and plugging it into the serial port.
  2. Take a metal paperclip or wire and cross pins 2 and 3. If you look closely at the female end, the pins should be numbered.
  3. Open a telnet session on the COM port number of the device that you are testing. To find out the COM port number, refer to the following FAQ:

Note: To open a telnet session on the COM port, you need a telnet client like PuTTY or Hyper Terminal. Windows XP comes with Hyper Terminal.

  1. When the session is open, anything you type into it you should see. The loopback test fails when you cannot see what you are typing.

If the loopback test fails, make sure that the serial cable or gender changer that you are using works and that the adapter is in the correct port. 

You can check multiple ports at the same time by opening multiple sessions, putting the loopback adapter on one port, and trying to type into each session.  When you can see what you are typing, you know that the COM port is working and you can see which port number the physical serial port is. Close the window for the port that you just tested to speed up the testing of the remaining serial ports.

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Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

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