DSU-100 Dual RS-232 Serial Ports Driver
DSU-200/300 Dual RS-422/485 Serial Ports Driver
ESU-100 Eight RS-232 Serial Ports 1-4 Driver
ESU-100 Eight RS-232 Serial Ports 5-8 Driver
ESU-200/300 Eight RS-422/485 Serial Ports 1-4 Driver
ESU-200/300 Eight RS-422/485 Serial Ports 5-8 Driver
HSU-100 Sixteen RS-232 Serial Ports 01-04 Driver
HSU-100 Sixteen RS-232 Serial Ports 05-08 Driver
HSU-100 Sixteen RS-232 Serial Ports 09-12 Driver
HSU-100 Sixteen RS-232 Serial Ports 13-16 Driver
HSU-200/300 Sixteen RS-422/485 Serial Ports 01-04 Driver
HSU-200/300 Sixteen RS-422/485 Serial Ports 05-08 Driver
HSU-200/300 Sixteen RS-422/485 Serial Ports 09-12 Driver
HSU-200/300 Sixteen RS-422/485 Serial Ports 13-16 Driver
Windows XP, Windows 2000
usb580.exe (187.4 KB)
5.805.80 (2005-01-10) via .inf
5.80 (2005-01-11) via .inf
Driver Version 5.80--WHQL signed
Nagarajah (DG Staff Member) on 21-Feb-2006
The following files are found inside the driver download file.
|QTUSBBX2.INF||7.4 KB||11 Jan 2005|
|QTUSBCOM.DLL||19.8 KB||12 Aug 2004|
|QTUSBCOM.SYS||63.3 KB||11 Aug 2004|
|QTUSBPT2.INF||3.5 KB||10 Jan 2005|
|SERQTUSB.VXD||7.8 KB||26 Oct 2001|
|cocpyinf.dll||22.0 KB||16 Apr 2003|
|history.txt||16.3 KB||21 Jan 2005|
|qtucombx.sys||93.3 KB||31 Jan 2005|
|qtucomco.dll||6.1 KB||10 Jan 2005|
|qtucompp.dll||37.9 KB||10 Jan 2005|
|qtucompt.sys||57.9 KB||20 Jan 2005|
|qtusbbx2.cat||11.5 KB||8 Feb 2005|
|qtusbpt2.cat||8.9 KB||8 Feb 2005|
|qtwdmlib.sys||18.0 KB||17 Jan 2005|
|readme.txt||9.8 KB||14 Apr 2003|
To get the QSU-100-EMB driver, click the green download button above. After you complete your download, move on to Step 2.
If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter QSU-100-EMB into the search box above and then submit. In the results, choose the best match for your PC and operating system.
Tech Tip: If you are having trouble deciding which is the right driver, try the Driver Update Utility for QSU-100-EMB. It is a software utility which automatically finds and downloads the right driver.
Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.
In Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager
In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager
In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager
In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager
In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button
Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.
Select the Driver tab.
Click the Update Driver button and follow the instructions.
In most cases, you will need to reboot your computer in order for the driver update to take effect.
Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.
For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.