Kistler-Morse KM L-Cell Bolt-On - Manual (Page 53)

Chapter 5. L-Cell Installation on Skirt-Supported Vessels
5-16
little extra for strain relief. Cut the excess cable. Fig 5-37
6. Strip 3” (76mm) of the cable sheathing to expose the three wires
inside. Strip
1 / 4 ” (6mm) of insulation from the end of each of the
wires.
7. Connect the wires from the L-Cell to the selected TB3 terminals:
black wire to B, white wire to W, and red wire to R. Fig 5-38.
8. Perform Steps 2 through 7 for each L-Cell you wire to this junction
box (up to four).
9. Spread a generous bead of sealant (Sikaflex 1A polyurethane
sealant or Dow Corning RTV 739 or RTV 738) around the threads of
the plug for each small hole in the junction box not being used.
Screw a plug into each hole.
10. Replace the junction box cover and screws if not ready to begin
wiring the junction boxes together, to ensure no moisture enters the
junction box.
Wiring L-Cells to Junction Box
Note
The four small holes in the bottom of the junction box are for
wiring L-Cells to the junction box.
1. Remove the junction box cover Fig 5-35.
2. See Figure 5-36. Place a plastic washer on the watertight fitting.
Thread the L-Cell cable through a cap and watertight fitting. Leave
an adequate length of cable between the L-Cell and fitting to
provide a drip loop (see Figure 5-39).
3. See Figure 5-36. Spread a generous bead of sealant around the
threads of the watertight fitting.
CAUTION
Only use Sikaflex 1A polyurethane sealant or Dow Corning
RTV 739 or RTV 738. Other sealants may contain acetic acid,
which is harmful to sensors and electronics.
4. In the bottom of the junction box, locate one of the four small holes
that is closest to the terminal you will be using for that L-Cell.
Screw the watertight fitting into the hole.
Note
TB3 terminal block has 12 terminals to accommodate four L-Cells
(L-Cells A, B, C, and D). Locate the terminal labeled for the L-Cell
you are wiring.
5. Estimate the required length of cable to the terminal strip, allowing a
Watertight
Fitting
& Cap
Sealant
L-Cell Cable
Small Hole
12
12
12
12
123456 Plastic
Washer
Figure 5-36.
Inserting L-Cell Cable through
Watertight Fitting and Cap
Figure 5-35. Junction Box
Figure 5-37. Estimate length