Specifications

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(Figure 12)
4) Windows will automatically locate the driver, for example, “e:\drivers\windows
2000_server 2003_xp_vista x32\ftdibus.inf”. Click on the “Next” button to continue
(Figure 13).
(Figure 13)
5) When the driver is successfully installed, the following window will pop up,
confirming that the driver installation of “USB Serial Converter” has been completed.
Click on the “Finish” button to continue (Figure 14).
Revision: 1.0 www.CommFront.com Page 10 of 16
(Figure 14)
6) The 2
nd
“Found New Hardware” window will pop up, prompting you to install the
driver for “USB Serial Port”. DO NOT close this window! And repeat steps 1) to 5)
to install the driver for “USB Serial Port”.
7) When the 2
nd
driver installation is completed, remember to check the Windows
Device Manager to confirm that the drivers are installed successfully (Figure 2). The
USB-485-1 will show up in the Windows Device Manager: under “Ports (COM &
LPT)” – labeled as “USB Serial Port (COMx)”, and under “Universal Serial Bus
controllers” - labeled as “USB Serial Converter”.
■ TROUBLESHOOTING
 General
1) Make sure that the USB-485-1 is connected to your USB port, and the driver is
installed correctly (Figure 2); otherwise, please reinstall the driver (Please refer to
the “Driver reinstallation examples” below).
2) Make sure the “Power” LED on USB-485-1 is lit up.
3) Perform a loopback test by using CommFront’s 232Analyzer software (included on
the CD supplied with the converter):
Connect two numbers of USB-485-1 converters (A+
to A+, B- to B-) to your USB ports and run two instances of the 232Analyzer software, then
send commands from one COM port, you should receive an echo of the commands sent on
the other COM port.
By performing a simple loopback test like this, you can test both
the transmitter and receiver of the converter. This is very helpful when you are in
doubt about the performance of your converter (Figure 15).