NEC OLP-484, Installation Manual

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www.necdisplay.com OLP-484
NEC Display Solutions of America, Inc.
80-Point Touch Overlay
Installation Guide for the OLP-484
Rev 1.4
7.0 Grounding Provisions
7.1 Purpose
The 80-point touch overlay is a very sensitive device that can detect the slightest change
to its environment, especially when conductive items are in close proximity. For example,
it can sense the difference between a stand alone touch overlay mounted on a monitor
and when the monitor and overlay are installed in a kiosk or other enclosure. Insufficient
grounding of all conductive components in the overlay’s environment may result in
random “false touches” or total touch system lock-up/failure.
7.2 Grounding Instructions
When a monitor with 80-point overlay is installed in an enclosure or kiosk, the following
steps must be taken to ensure correct touch functionality.
7.2.1 Place the grounding wire on top of the #6-32 serrated hex nut adjacent to the USB cable output,
as shown in figure 8a.
Figure 8a
7.2.2 Secure the grounding wire using the provided #6-32 silver hex nut, as shown in figure 8b.
Figure 8b