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Chapter 7: Serial Ports
Serial Port Printers
Changes to the setting must be done by an authorized repair centre.
7.1.4
Serial Port Printers
Printers with a serial port can be connected to the 8580/8590.
7.1.5
Serial Port Bar Code Scanners
To activate the integrated scanner software wedge under Windows XP Embedded:
1. Open the Start menu and navigate to Settings>Control Panel>Accessibility.
2. Choose the General tab.
3. Choose Support accessibility options.
4. Click Settings.
5. Configure the desired COM port and BAUD rate.
6. Confirm the change with OK.
7. Click OK again for the changes to take effect.
Important: Keep in mind that you must configure the scanner correctly to RS-232 and
7.1.6
Tips & Tricks
Note that according to the EIA-232-E specification, the maximum cable length is 15 m at
19,200 bps.
RS-232 connection malfunctions are frequently caused by ground loops. If both end devices
establish a ground connection via RS-232 but do not share the same ground potential in their
power supply circuits, compensation currents may result. This is particularly noticeable with
long cables.
These compensation currents, which are also present at the ground point of the RS-232 con-
nection, may significantly degrade signal quality and effectively stop the data flow. In
challenging environments, electrically-isolated connections (via external converters) are
strongly recommended.
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8580/8590 Vehicle-Mount Computer User Manual
the above set BAUD rate, following the scanner manufacturer's guidelines.
Otherwise the software wedge will not function properly.
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