1 Port Professional USB to Serial Adapter Cable with COM Retention

Add one serial RS-232 port with com retention to any laptop or computer with a USB port

Product ID: ICUSB2321X

1 stars (4 reviews) |
  • USB to Straight-Through RS232 Serial Adapter
  • COM Port assignments maintained across reboot
  • Single cable design for portability
Your price
€39,99 EUR excl. VAT
€49,59 EUR incl. VAT

The ICUSB2321X Professional grade USB Serial Adapter cable converts a USB 2.0 port into an RS232 serial port allowing you to connect to, monitor and control your serial devices. A durable, single cable design makes this the perfect solution for mobile technicians/administrators that require serial connectivity. Once connected, the USB to serial adapter retains assigned serial COM port values, allowing the same values to automatically be re-assigned to the port provided by the adapter in the event it is disconnected, then re-connected to the host computer.

This innovative adapter offers a professional grade solution for connecting legacy or industrial RS232 serial devices to more modern computers, or computers with unused USB ports – perfect for connecting serial modems, barcode scanners or any device with serial sync through USB, eliminating the expense of upgrading the serial peripheral for USB compatibility.

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

Applications

  • Perfect for IT Administrators looking to add legacy functionality to newer notebooks, PCs and servers that lack an integrated RS232 port
  • Connect, monitor and control industrial/automotive sensors and equipment
  • Connect bar code scanners, receipt printers and other point of sale devices
  • Connect a satellite receiver, serial modem, or PDA with serial sync
  • Connect and program LED and Digital signage boards with serial communication ports

The StarTech.com Advantage

  • Simple installation and operation with COM port retention provides robust serial connectivity for legacy devices with minimal hassle
  • Easy plug and play installation with USB Powered device - no power outlet required
  • Extensive list of compatible operating systems makes this device perfect for almost any RS232 application

Partner Numbers

  • Ingram Finland V930642
  • UPC 065030827270

Compatibility

  • Windows 8 logo
  • Windows Server 2012 logo
  • Windows 7 logo
Windows® XP, Vista, 7, 8
Windows Server® 2003, 2008 R2, 2012

Specifications

Warranty Information Warranty 2 Years
Connector(s) Connector Type(s) 1 - USB Type-A (4 pin) USB 2.0
1 - 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 1
Interface Serial
Bus Type USB 2.0
Port Style Cable Adapters
Chipset ID Texas Instruments - TIUSB3410
Packaging Information Package Height 32 mm [1,3 in]
Package Length 14,4 cm [5,7 in]
Shipping (Package) Weight 0,1 kg [0,2 lb]
Package Width 17,4 cm [6,9 in]
Performance Serial Protocol RS-232
Max Baud Rate 230.4 Kbps
FIFO 32 Bytes
MTBF 453,206 hours
Physical Characteristics Weight of Product 30 g [1,1 oz]
Color Black
Material Plastic
Cable Length 304,8 mm [12,0 in]
Product Length 42 cm [16,5 in]
Product Width 35 mm [1,4 in]
Product Height 1,3 cm [0,5 in]
Software OS Compatibility Windows® XP, Vista, 7, 8
Windows Server® 2003, 2008 R2, 2012
Special Notes / Requirements System and Cable Requirements One available USB 1.1 (or above) port
What's in the Box Included in Package 1 - USB to Serial Adapter
1 - Instruction Manual

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Drivers/Downloads

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Driver(s):

Manual(s):

Datasheet

Product Support

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Frequently Asked Questions

Troubleshooting

Older applications that use serial communication often use legacy hardware addresses that do not work with PCI, PCIe, or USB to Serial products. We recommend contacting the software provider/support team to check if this is the case.

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.

If the USB device does not work after your computer has been in extended hibernation, it is likely that Windows has automatically turned off the USB Root hub to save power. 

The steps below outline how to configure the USB root hub to stay on during hibernation, to prevent this from happening.
 

Windows 10 / 8

  1. On your keyboard, press the Windows key + X and select Control Panel.
  2. Click Hardware and Sound, then click Power Options.
  3. Click Change plan settings for the plan you want to change.
  4. Click Change advanced power settings.
  5. Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
  6. Click OK to apply the setting.

Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.

Windows 7 / Vista

  1. Click the Start button and select Control Panel.
  2. Click Hardware and Sound, then click Power Options.
  3. Click Change plan settings for the plan you want to change.
  4. Click Change advanced power settings.
  5. Click the plus sign (+) next to “USB settings” and “USB selective suspend setting” to expand the options and change the setting to Disabled.
  6. Click OK to apply the setting.

Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.

Windows XP

  1. On your desktop, right-click the My Computer icon and select Properties.
  2. Click the Device Manager tab.
  3. Expand Universal Serial Bus controllers by clicking the arrow to the left of it.
  4. Right-click the first USB Root Hub device and select Properties.
  5. Click the Power Management tab.
  6. Clear the box next to Allow the computer to turn off this device to save power.
  7. Click OK to apply the setting.
  8. Repeat steps 4-7 for any remaining devices in the Universal Serial Bus Controllers section with “Root Hub” in the name.

Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.

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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Installation

Some driver installation packages may require you to disable driver signature enforcement in Windows 8, which will allow unsigned driver packages to be installed on your system.

Note: Before you continue, save any open documents and close all open programs.

To disable driver signature enforcement, complete the following:

  1. Press the Windows key + C.
  2. Click Settings > Change PC Settings.
  3. In the left pane, click General.
  4. In the right pane, under Advanced startup, click Restart now.

When your system finishes restarting, complete the following:

  1. Click Troubleshoot > Advanced options > Startup Settings > Restart.
  2. Press 7.

When your computer restarts, driver signature enforcement will be disabled and you can install your drivers.

Note: When you restart your computer after you install your drivers, driver signature enforcement will be enabled again. This does not prevent your newly installed drivers from working, but does prevent any other unsigned drivers from being installed until driver signature enforcement is disabled.

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 StarTech.com Adapter, 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 Driver folder 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 usbuart3410 file. Click OK, and then click Next.

If the installation is not successful, repeat steps 4 to 12 and click the usbuart3410b file.

Some driver installation packages may require you to disable driver signature enforcement in Windows 8.1, which will allow unsigned driver packages to be installed on your system.

Note: Before you continue, save any open documents and close all open programs.

To disable driver signature enforcement, complete the following:

  1. Press the Windows key + C.
  2. Click Settings > Change PC Settings.
  3. In the left pane, click Update & Recovery.
  4. In the left pane, click Recovery.
  5. Under Advanced startup, click Restart now.

When your system finishes restarting, complete the following:

  1. Click Troubleshoot > Advanced options > Startup Settings > Restart.
  2. Press 7.

When your computer restarts, driver signature enforcement will be disabled and you can install your drivers.

Note: When you restart your computer after you install your drivers, driver signature enforcement will be enabled again. This does not prevent your newly installed drivers from working, but does prevent any other unsigned drivers from being installed until driver signature enforcement is disabled.­­­­­­­

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:\Users\your_name\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 StarTech.com Adapter, which will have a “!” or “?” next to it to indicate a driver issue.
  4. Click Update Driver.
  5. Click Browse my computer for driver software.
  6. Select the Let me pick from a list of device drivers on my computer option.
  7. On the Select your device’s type from the list below screen, click Show All Devices, and click Next.

Note: The Select your device’s type from the list below screen does not appear on all systems. If you do not see this screen, skip this step.

  1. Select the Have Disk option.
  2. Browse to the Drivers folder and open the 32-bit or 64-bit folder.

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

  1. Click the usbuart3410 file. Click OK, and then click Next.

If the installation is not successful, repeat steps 4 to 11 and click the usbuart3410b file.

How To

To confirm that Windows detects your USB device, 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 USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

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.

Customer Reviews

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(1 Stars)
By: Jim from Resonate - 03/04/2020
Purchased by my company It will not work at all on Windows 10 the drivers are not recognised (unsigned) and will not load. Unusual for Startech to provide such a product without a platform use warning - ie not compatible with Windows 10
| Helpful?
Matt, Customer Support on 05/03/2020 10.09.51
Hello Jim, We apologize for the difficulties you're experiencing with our ICUSB2321X. This adapter is not supported in Windows 10 but we're reaching out directly using the email address provided to see if we can get this working or help you find a viable replacement option.
(1 Stars)

Does not work with Windows 10

By: rs323sucks - 03/17/2020
Worked fine with Windows 7, but purchased a new PC with Windows 10 and found that I can no longer do my job as this adapter does not work with Windows 10. Seems like updating the drivers would not have been impossible, as every other piece of technology works.
| Helpful?
Matt, Customer Support on 19/03/2020 14.00.40
We apologize for the difficulties you're experiencing with our ICUSB2321X. This adapter is not supported in Windows 10 however you may be able to install the drivers by disabling Driver Signature Enforcement. If this does not work, we recommend looking at a different adapter for Windows 10 compatibility, such as our ICUSB2321F.
(1 Stars)

dose not work anymore

By: timmy 22 - 03/18/2020
need help my icusb2321x will not work now with windows 10
| Helpful?
Matt, Customer Support on 19/03/2020 14.03.12
It's important to us that our customers have a positive experience with our products and we're sorry to hear that our ICUSB2321X is no longer working for you. This adapter is not supported in Windows 10 but you may be able to install the drivers if you disable driver signature enforcement in Windows. If this does not allow the drivers to install or if you're not able to disable this setting, we recommend looking at a different USB to Serial adapter such as our ICUSB2321F which uses an FTDI chipset and has Windows 10 support.
(1 Stars)

Not support for Windows 10

By: Dougbert78 - 05/20/2020
Totally unacceptable that Startech doesn't have updated drivers for an OS that is now 5 years old and Microsoft is committed to solely supporting now that windows 7 is going defunct. Put out an updated driver for this already!
| Helpful?
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