2-26 IntelliTouch/SecureTouch Guide
CAUTION
Observe polarity when connecting the power leads to the power supply. Reversing
polarity may damage the controller.
Possible power supply sources included:
• A direct power cable to a +5 Vdc source inside the display or tap unregulated
monitor power in the +9 Vdc to +30 Vdc range using the Elo DC-to-DC
converter (See “Elo Part Numbers” on page79). Attach the direct power
cable (See “Elo Part Numbers” on page79) to the source, red to + 5 Vdc and
black to common. You must attach the green ground cable to a suitable
chassis ground for noise immunity and safety considerations. Observe
polarity when connecting the power leads to the power supply. Reversing
polarity will damage the controller.
•Typical converter power consumption is approximately 1 W. Remember
that each integration situation is unique; you must carefully evaluate
available power rails and consider how drawing additional power from the
display will affect monitor performance.
• Install a power supply which requires a 100-240 Vac input. Connect a po wer
cable harness to P4 on the controller, a 2x5 header with pins on 0.100-inch
(2.54 mm) centers. Use a ribbon cable with an IDC connector or crimp-to-
wire pin receptacles. An acceptab le plug can be selected from M olex series
70450, Amp AMPMODU Mod. IV product line, or Berg mini-latch housing
with Mini-PV pins. Connect a power supply to the harness and then to AC.
•If none of the above options are practical, you must use either an optional
keyboard power tap or wall-mount power supply to furnish +5 Vdc power
to the controller .
CAUTION
Before using a keyboard power tap, be sure sufficient power is available for the
touchscreen controller or damage may occur to the computer.
Before connecting a keyboard power tap to the controller, be sure that power to the CPU
is OFF. Connecting a keyboa rd power tap to a powered CPU may seriously damage the
CPU or the controller and will blow the keyboard fuse.
1Decide where to mount the controller on the rear of the display case. After
choosing a location, use masking tape to hold the template in the desired spot
and drill a 1-inch diameter hole for cabling exiting the display and drill two
holes for screws that will be mounted in the display case.
2Route the touchscreen cable (and power cable if using an intern al ly locat ed
power source) through the 1-inch diameter hole in the display case. Insert the
touchscreen cable into the keyed receptacle in the rear of the controller box.
You will hear a “click” when the cable conne ctor is properly connected to the
controller. Pull any excess cabling back into the display case and attach the
controller to the display case.
3Wrap excess cabling with tie wraps as required, and proceed to “Routing the
Touchscreen Cables” on page2-29.