Preparing the Transducer Cable
Remove the junction box cover and set it aside along with the two
screws and the bag of hardware containing clear tubing and four
6 x 1/2" screws.
IMPORTANT
: Do not cut the transducer cable too short.
1. Be sure the power to the echo sounder is OFF.
2. Cut the transducer cable 30cm (1') beyond the location of the
junction box to allow for wiring ease.
3. Loosen the nut on the cordgrip (Figure 1). Carefully push
approximately 200mm (8") of the transducer cable through the
appropriate cordgrip. Apply alcohol to the cable jacket to ease
sliding.
4. Strip 125mm (5") of the outer jacket from the cut end of the
transducer cable (Figure 2).
5. Strip 60mm (2-1/2")of foil shielding from the shielded pairs.
6. Cut off the purple wire at the cable.
It is not used
.
7. Strip 10mm (3/8") of conductor insulation from the end of each
insulated wire.
8. Protect each cable’s foil shielding from causing a short inside
the switchbox by using heat shrink tubing around the cable
jacket where the wires emerge from the cable. The tubing must
overlap the wires a minimum of 6mm (1/4"). Use a heat gun to
shrink the tubing.
9. Cover the bare wires. Cut the clear sleeving supplied to fit over
the bare wires from the cable jacket/foil shielding to within
10mm (3/8") of the end. Slide the clear sleeve over bare wire(s)
until it touches the cable jacket/foil shielding.
Connecting
1. Take care when choosing each wire because the colors may
look similar.
Note, there are wires with striped insulation.
Follow
the color key on the junction-box label (Figure 3).
2. Connect each colored wire to the terminal opposite the
matching colored wire from the sonar.
Note that the terminals
are numbered.
Insert the stripped end in the square opening in
the side.Tighten the terminal screw until the wire is held firmly in
place
.
Be sure the stripped end of the wire is inserted up to the
insulation only
. Do not include any insulation inside the
terminal.
3. Gently tug on the wire to ensure it is locked in place. If any bare
wire is visible, shorten the stripped end and reconnect it to the
terminal.
Completing the Installation
1. From outside the junction box, carefully pull the transducer cable
until only about 13mm (1/2") of the cable jacket remains inside
the box.
2. Hand-tighten the nut on each cordgrip. Then use a wrench to
make an additional 1/4 to 1/2 turn to make a waterproof seal
(Figure 1).
3. Remove the tape from the foam on the back of the terminal
strip. Push the terminal strip into the junction box until it is
attached firmly to the bottom.
4. Arrange the wires neatly inside the box.
Be sure there are no
bare wires touching
.
5. Check to be sure the gasket is firmly installed in the channel on
the back side of the cover. Lubricate the gasket with petroleum
jelly as this will help to make a water tight seal. Screw the cover
in place with the 2 long screws supplied.
6. Fasten the junction box to the selected mounting surface at the
previously-drilled holes with the four 6 x 1/2" screws supplied.
7. Follow the instructions that came with your echo sounder to
plug both of the 9-pin connectors into the sounder.
Note that
one of the cables is low frequency and the other is high
frequency.
8. Fasten all loose cables in place.
Parts
Obtain parts from a local sales office, one of the websites below,
or a marine dealer.
www.lowrance.com
www.simrad-yachting.com
2
Figure 3. Junction-box label with wire color and function key
cable
jacket
inner
bare
outer
bare
NOTE
: Bare
wires are
covered with
clear tubing.
125mm (5")
remove cable jacket and
10mm
(3/8")
inner foil
shielded pair (2)
remove
insulation
outer foil shielding
shielding
Figure 2. Preparing the transducer cable
(C44 shown)
60mm (2-1/2")
insulated
wire (7)
heat-shrink
tubing