ASXPRESS PLUS Rapid Sample Introduction System Operator’s Manual
Chapter 7: Installing the Electronics Module
82
NOTES
If a host computer serial port with a DB9F, a DB25M, or a DB25F connector (9
pin D-submini receptacle or 25 pin D-submini plug or receptacle) must be used,
use the mating connector from the CETAC Technologies universal port adapter
kit. You can order the adapter kit from CETAC Technologies or purchase an
adapter locally to convert the serial port to a DB9M. Do not use a “null
modem” adapter.
When interconnecting any computing devices, keep the communications
cables away from sources of electromagnetic or radio frequency (RF)
interference, such as electric motors, transformers, fluorescent light ballasts,
or RF energy sources. Limit cable runs for RS-232C to less than 16 meters. If
these conditions cannot be satisfied, use low-impedance, fully shielded cables
to provide satisfactory operation. The cables are available from many sources,
but you will need to specify the correct mating connectors and “straight-
through” (DTE-DCE) wiring.
Establishing an OEM COM Connection (USB)
If the host computer does not have an available RS-232 port, you can use a USB
port instead.
A USB cable is supplied. Alternatively, an “A-B” USB cable may be obtained from
any computer store.
1 Power up both the computer and the ASXPRESS PLUS electronics module.
2 Plug one end of the cable into the host computer's USB port and the other end
to the ASX
PRESS PLUS system 's OEM COM USB port.
The computer screen should display a "New Hardware Found" window. A
USB driver must be installed to make the USB port emulate an RS-232 COM
port, and the installation must be repeated for each USB connection.
The exact procedure for installing the driver depends on the version of the
host computer’s operating system. The instructions which follow show
installation on the Windows XP operating system.
NOTE FOR WINDOWS 7
For the Microsoft Windows 7 operating system, the driver may not be found
automatically. You may need to navigate to on the CD-ROM to “\program
files\CETAC Technologies\Xpress Config\USB Drivers for CETAC Devices” to find
the driver file named “ftdiport.inf”. The hardware will be identified as an “FT
232R USB UART” and then as a “USB Serial Converter.”
3 Allow the Windows Found New Hardware Wizard to use Windows Update to
search for a driver.
In most cases, the driver will be found online and installed automatically.
This process may take several minutes.
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