2 cls-920i cpu board replacement, 1 enclosure disassembly, 2 cable connections – Rice Lake Lift Truck/Pallet Jack Scales - CLS-Series User Manual
Page 32: 3 cable grounding, Enclosure disassembly, Cable connections, Cable grounding, Section 5.2, 7arning
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CLS Series Service Manual
5.2
CLS-920i CPU Board Replacement
5.2.1
Enclosure Disassembly
The 920i indicator enclosure must be opened to install
option cards and to connect cables for installed option
cards.
The
920i
has no on/off switch. Before
opening the unit, ensure the power cord is
disconnected from the forklift power
source.
Ensure power to the indicator is disconnected, then
place the indicator face-down on an antistatic work
mat. Remove the screws that hold the backplate to the
enclosure body, then lift the backplate away from the
enclosure and set it aside.
5.2.2
Cable Connections
The universal model of the
920i
provides six cord
grips for cabling into the indicator: one for the power
cord, five to accommodate cabling for option cards.
Install plugs in all unused cord grips to prevent
moisture from entering the enclosure.
5.2.3
Cable Grounding
Except for the power cord, all cables routed through
the cord grips should be grounded against the
indicator enclosure. Do the following to ground
shielded cables:
•
Use the lockwashers, clamps, and kep nuts
provided in the parts kit to install grounding
clamps on the enclosure studs adjacent to cord
grips. Install grounding clamps only for cord
grips that will be used; do not tighten nuts.
•
Route cables through cord grips and
grounding clamps to determine cable lengths
required to reach cable connectors. Mark
cables to remove insulation and shield as
described below:
• For cables with foil shielding, strip insulation
and foil from the cable half an inch (15 mm)
past the grounding clamp (see Figure 5-6).
Fold the foil shield back on the cable where
the cable passes through the clamp. Ensure
silver (conductive) side of foil is turned
outward for contact with the grounding
clamp.
• For cables with braided shielding, strip cable
insulation and braided shield from a point just
past the grounding clamp. Strip another half
inch (15 mm) of insulation only to expose the
braid where the cable passes through the
clamp (see Figure 5-6).
Figure 5-6. Grounding Clamp Attachment for
Foil-Shielded and Braided Cabling
•
For load cell cables, cut the shield wire just
past th e ground in g clam p. Shield wire
function is provided by contact between the
cable shield and the grounding clamp.
•
Route stripped cables through cord grips and
clamps. Ensure shields contact grounding
clamps as shown in Figure 5-6. Tighten
grounding clamp nuts.
•
Finish installation using cable ties to secure
cables inside of indicator enclosure.
7ARNING
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