Elo TouchSystems AccuTouch 821615-000, Руководство по эксплуатации продукта

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A-73
Some serial ports require jumpers for the handshaking lines on the cable
connector at the computer end. The jumper combinations that may be required
to make an RS-232 port work are beyond the scope of this manual. Consult your
computer manual for more information.
If a breakout box is not available, you can measure the DC voltage at the data
output of the controller (RXD on the host). It should measure between -8 and -
10 Vdc when the touchscreen is not touched, and drop several volts (towards 0)
during a touch, depending on the data format and the baud rate. Slower baud
rates and ASCII data format will produce larger shifts in DC levels during the
transmission of touch data.
If proper RS-232 signal voltage is not present, the controller may not have
power applied.
Power Supply
Check for proper voltage (+5 Vdc) at the power connector P4 on the controller.
If the LED is functioning, the power supply is probably okay. To access this
connector on the Tabletop Serial Controller, disconnect the power cable then
remove the screws from the bottom of the cover. After the cover has been
removed, reconnect the power cable and turn the unit on. There are no exposed
electrical connections in the controller that would be considered dangerous.
Power is applied to the controller through P4.
If no power is present, measure the voltage at the power supply. If using the
Tabletop Controller power supply, the pinout (5-pin DIN male), is shown in
Figure A-2. Only +5 Vdc and Ground are used by the E271-2210 controller.
Figure A.2 Tabletop Controller Power Supply Cable Connector