Discontinued

2 Port RS232 Mini PCI Express Serial Card w/ 16950 UART

Add two RS232 serial ports to an Embedded System with a mini PCI-Express slot

Product ID: MPEX2S952

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  • Compliant with PCI Express base specifications revision 1.1a
  • High Performance Dual Channel Oxford 16950 UART
  • Native single-Chip, single lane PCI Express

The MPEX2S952 2-port Mini PCI Express serial card turns a mini-PCIe slot into two RS232 (DB9) serial ports - a cost-saving solution for adding legacy serial support for embedded systems that aren't normally compatible.

The adapter card features a native PCI Express single chip design, which allows you to take advantage of full PCI Express capability by providing improved speed and reliability while reducing the load applied to the CPU by as much as 48% over conventional "bridge chip" serial cards .

Designed and constructed to provide long-lasting durability and reliability, the 2-Port Mini PCI Express RS232 Serial Card is backed by our Lifetime Warranty and free lifetime technical support.

Application Diagrams

MPEX2S952 Application Diagram 1

MPEX2S952 Application Diagram 2

Applications

  • Add serial ports to industrial embedded computers and systems
  • Add serial RS232 control to an embedded or slim media center/media server
  • Additional ports to slimline POS systems
  • Connect to any motherboard with a PCI Express mini slot

The StarTech.com Advantage

  • Native single chip design means up to 48% less load on your CPU which is critical for small embedded PCs that use low power, low MHz CPUs
  • The smallest form factor available for internally adding serial ports to any embedded system
  • Backed by a StarTech.com free lifetime warranty

Partner Numbers

  • UPC 065030840019

Compatibility

  • Windows 8 logo
  • Windows Server 2012 logo
  • Linux logo
  • Windows 7 logo
  • Windows Server 2016 logo
Windows® CE 6.0 / 5.0, 95, 98SE, 2000, XP, XP Embedded, Vista, 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
Linux 2.4.x to 4.4.x LTS Versions only

Specifications

Warranty Information Warranty Lifetime
Connector(s) 1 - Connector Type(s) Mini PCI Express x1 (52 pin)
2 - External Ports DB-9 (9 pin, D-Sub)
Environmental Operating Temperature -10°C to 80°C (14°F to 176°F)
Storage Temperature -20°C to 100°C (-4°F to 212°F)
Humidity 5~85% RH
Hardware Ports 2
Interface Serial
Bus Type Mini PCI Express
Card Type Embedded
Port Style Dongle (Included)
Chipset ID PLX/Oxford - OXPCIe952
Packaging Information Package Length 2,1 m [7,0 ft]
Package Width 38 mm [1,5 in]
Package Height 15 cm [5,9 in]
Shipping (Package) Weight 140 g [4,9 oz]
Performance Serial Protocol RS-232
Max Baud Rate 460.8 Kbps
Data Bits 4, 5, 6, 7, 8
FIFO 128 Bytes
Flow Control None, Xon/Xoff, RTS/CTS
Parity None, Odd, Even, Space, Mark
Stop Bits 1, 1.5, 2
Physical Characteristics Color Green
Product Length 50 mm [2,0 in]
Product Width 30 mm [1,2 in]
Product Height 10 mm [0,4 in]
Weight of Product 6 g [0,2 oz]
Software OS Compatibility Windows® CE 6.0 / 5.0, 95, 98SE, 2000, XP, XP Embedded, Vista, 7, 8, 8.1, 10
Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016
Linux 2.4.x to 4.4.x LTS Versions only
Microsoft WHQL Certified Yes
What's in the Box 1 - Included in Package 2 Port Mini-PCIe Serial Card
2 - Included in Package DB9 ribbon cable
1 - Included in Package LP4 to 6 pin power cable
Driver CD
Instruction Manual

Drivers/Downloads

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Manual(s):

Datasheet

Product Support

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Frequently Asked Questions

Installation

Before you install the device, make sure that your operating system is current (for example, the most recent service pack is installed).

  1. Download the latest drivers from the StarTech.com website at http://www.startech.com/Support. The part number and product ID are on the product packaging.

Note: Windows usually saves the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\your_name\My Documents\Downloads).

  1. After the download is complete, right-click the zip folder that you downloaded, click Extract All, and complete the instructions.
  2. Press the Windows key + R, type devmgmt.msc, and press Enter to open the Device Manager.
  3. Right-click PCI Serial Port, which will have “!” or “?” next to it to indicate a driver issue.
  4. Click Update Driver.
  5. On the Hardware Update Wizard screen, click Install from a list or specific location (Advanced), and then click Next.
  6. Select the Don’t search, I will choose the driver to install option, and then click Next.
  7. On the Hardware Type screen, click Show All Devices, and then click Next.

Note: The Hardware Type screen does not appear on all systems. If you do not see this screen, skip this step.

  1. On the Select the Device Driver you want to install for this hardware screen, select the Have Disk option.
  2. In the Install from Disk dialog box, click Browse.
  3. Browse to the Windows folder, select the folder for your operating system, and open the 32-bit or the 64-bit folder, depending on your system type.

Note: To view your system type, click Start. Right-click Computer, and then click Properties.

  1. Click the OxMf or OxPCIeMf file. Click OK, and then click Next.

Note: If you are using a serial card that uses the OxPCIeMf file and installation fails, repeat steps 4 to 10, then browse to the Windows folder. Browse to the Serial Port Driver folder and click the oxserleg file.  Click OK, and then click Next.

Troubleshooting

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: https://www.startech.com/faq/com-port-listing-windows.

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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How To

To confirm that Windows detects your expansion card, complete the following:

  1. Press the Windows key+R, type devmgmt.msc, and press Enter.
  2. In Device Manager, under the appropriate heading, confirm that your expansion card is listed and that there isn't an exclamation mark next to it.  For example, a USB controller card would be under Universal Serial Bus controllers.

Your expansion card is listed according to the name of the chipset. To determine the name of the chipset of your expansion card, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

Before You Buy

Serial cards derive power from the PCI or PCI Express slot on the motherboard. When you power serial devices from the serial card ports, the power provided by the slot may not be enough to power all of the devices and you should connect additional sources of power from the power supply. When you troubleshoot issues, you should connect an additional source of power.

Some signs that you are experiencing power-related issues include certain devices not working correctly, not all of the devices working at the same time, and certain devices not working at all.

Compliance and safety

Compliance letters

  • RoHS
    • Language: English
  • WEEE
    • Language: English

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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