Chapter 5: Mechanical Considerations
Back Cover Modules and Devices
Psion Teklogix Omnii HDK User Manual
71
5.4.4
Back Cover Modules and Devices
This section describes the specifics of designing and mounting custom-made back covers
on Omnii.
Designing Back Cover Modules
To maintain proper protection against water and dust ingress, back cover modules must form a
tight seal with the main housing. A soft overmould around the perimeter of the opening creates a
seal with the attached back cover. The back cover module must be designed with a corresponding
hard ridge that presses into the overmould to form this seal. The 3D CAD model of any of the
supplied back covers can be used to obtain the required width, depth and shape of this ridge.
Table 5.9 Associated Files for Back Covers
Description
Filename
2D line drawings of the auto-range standard back cover with
locations of mounting points for the back cover and pistol grip
Back_Cover_Auto_Std_2D.dwg
Back_Cover_Auto_Std_2D.pdf
3D CAD models of the auto-range standard back cover
Back_Cover_Auto_Std_3D.igs
Back_Cover_Auto_Std_3D.stp
2D line drawings of the expansion back cover with locations of
mounting points for the back cover, pistol grip, end-cap and
pod expansion
Back_Cover_Expan_2D.dwg
Back_Cover_Expan_2D.pdf
3D CAD models of the expansion back cover, showing end-cap
and pod expansion openings with sealing overmoulds, and
keep-away areas for camera and speaker options
Back_Cover_Expan_3D.igs
Back_Cover_Expan_3D.stp
2D line drawings of the large standard back cover with loca-
tions of mounting points for the back cover and pistol grip
Back_Cover_Large_Std_2D.dwg
Back_Cover_Large_Std_2D.pdf
3D CAD models of the large standard back cover
Back_Cover_Large_Std_3D.igs
Back_Cover_Large_Std_3D.stp
Table 5.10 Required Fasteners
How Used
Quantity Part Number Screw Size Torque
(in-lb)
Bit
Pod Expansion to Expansion Back Cover
4
1005090
M3x5
5.0
T10
Back Cover to Main Housing (Back)
8
1004948
M3x6
5.0
T10
Back Cover to Main Housing (Front)
2
1004946
M2x8
2.5
T6
Inserts
2
1005273
M2x5
N/A
N/A
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