Kistler-Morse KM Microcell Bolt-On - Manual (Page 27)

Note
Junction box mounting hardware is not
supplied by Kistler-Morse
® . Kistler-Morse ®
recommends #8-32 socket head cap screws
and flat washers. The instructions below reflect
this recommendation.
1. Remove the junction box cover.
2. See Figure 4-11. Hold the junction box at the
previously marked mounting location. Mark
the mounting holes.
3. Drill and tap the mounting holes with a #29 drill
bit and #8-32 tap.
4. Mount the junction box with #8-32 socket head
cap screws and flat washers. Tighten the
screws until snug. Replace the junction box
cover and screws if not ready to begin wiring
to ensure that no moisture enters the junction
box.
Figure 4-11. Junction Box Mounting.
Figure 4-12. Inserting Microcell™ Cable Through
Watertight Fitting and Cap.
WIRING MICROCELL™ SETS TO
JUNCTION BOX
Note
A. Junction box PCB 63-1135-03 is used for
Microcell™ sets on beams. Ensure you
have this PCB in the junction box
(See Figure 4-13).
B. The four small holes in the bottom of the
junction box are for wiring the Microcells™
to the junction box.
1. Remove the junction box cover.
2. See Figure 4-12. Place a plastic washer on
a watertight fitting. Thread the Microcell™
cable through a cap and watertight fitting.
Leave an adequate length of cable between
the Microcell™ and fitting to provide a drip
loop (See Figure 4-13).
3. Spread a generous bead of sealant around the
sides of the watertight fitting.
CAUTION
Only use Sikaflex 1A polyurethane sealant or
Dow Corning RTV 738 or RTV 739. Other
sealants may contain acetic acid, which is
harmful to sensors and electronics.
4. See Figure 4-13. In the bottom of the junction
box, locate one of the four small holes closest
to the terminal being used for that Microcell™.
Screw the waterright fitting into the hole.
Figure 4-13. Wiring Microcells™ to Junction Box.
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