Interlink Electronics MicroModule PS2 - Manual (Page 9)

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7
PS2 MicroModule
Integration Guide
5.3 Supporting MicroModule’s PCB
A mounting bracket/clip should be added during installation of MicroModule to support its
PCB. The mounting bracket/clip should be designed to mount around the edge of the PCB
and should help prevent excessive flex in the PCB. The below figure illustrates the concept
of the supporting bracket design.
Figure 6: MicroModule Mounting with PCB support bracket in a rear side view of panel/case.
5.4 Sealing MicroModule with Silicone Sealant
MicroModule’s silicone-rubber actuators are designed with an integrated sealing rib that
allows MicroModule to be sealed into a system during installation. Common silicone sealant
or mounting brackets can also be used to create a watertight seal. Once sealed into a
system, spills, rain, or humidity will not affect MicroModule’s performance-making it ideal
for field service, outdoor, or hose-down environments.
RTV silicone sealant can be used as a sealing material. Before starting installation, be sure
to clean the panel and rubber keypad thoroughly with isopropyl alcohol. Integrators may
also find that some panel/bezel materials will need to be primed with a silicone primer to
obtain proper adhesion. To seal MicroModule with silicone sealant, apply a thin bead of
sealant to the top of the rubber keypad on the outer edge of the keypad’s sealing rib.
Minimize the amount of sealant applied to prevent lumping near the active buttons, which
could adversely affect the MicroModule’s performance. Alternately, sealant can be applied
around the perimeter of the module and the bolt holes after it has been mounted into the
bezel or panel. For the best possible seal, apply the sealant to both the top of the keypad
before installation, and around the perimeter of the module after installation.