-12-
PRO
PILOT
725 INSTALLATION & SERVICING MANUAL
Installing
your
Propilot
725
currents
(such
as
winches
etc.).
At
least
3
ft.
clearance
is
advised.
Take
particular
care
to
ensure
the
maximum
clearance
from
radio
transmitting
aerials.
If
it
is
necessary
to
extend
any
of
the
cables,
the
same
type
of
cable
must
be
used
and
the
screens
must
be
connected.
Screened
cables
should
be
earthed
at
the
Distribution
Box
using
the
clamping
bars
provided.
If
it
is
necessary
to
extend
the
Drive
Unit
cables,
they
should
be
extended
using
a
heavy
duty
cable,
by
the
shortest
possible
route,
to
avoid
unnecessary
power
loss.
If
the
vessel
has
a
"clean"
earthing
system
(ie
using
a
dyna
plate
or
similar
system)
then
the
case
of
the
Distribution
Box
may
be
connected
to
it
using
a
heavy
duty
cable
or
copper
strip,
this
will
usually
improve
RFI
rejection.
Note:
The
negative
of
the
battery
system
is
not
normally
a
clean
earth
and
the
case
of
the
Distribution
Box
should
not
under
any
circumstances
be
connected
to
it.
All
DC
supply
cables
should
be
kept
as
short
as
possible,
and
should
be
taken
from
the
battery
via
a
switch/fuse
or
circuit
breaker
of
a
suitable
rating
for
the
system
being
installed.
Two
separately
switched
and
fused
power
supplies
must
be
connected
to
the
Distribution
Box.
The
first
is
for
the
light
duty
primary
supply
for
the
electronic
control
system.
The
second
is
for
the
heavy
duty
supply
for
the
drive
unit.
Avoid
running
power
and
motor
supply
cables
together
or
in
the
same
conduit
with
control
and
compass
cables
to
help
reduce
the
risk
of
interference.
It
is
good
practice
to
cleat
all
cables
to
fixed
points
at
no
less
than
0.5
m
(18")
spacing
and
where
cables
pass
through
bulkheads,
protect
the
cable
with
a
suitable
grommet
or
sleeve.
Connecting
All
the
connections
for
the
system
are
made
to
the
PCB
in
the
the Autopilot
Distribution
Box
which
is
clearly
marked
to
make
connections
easy
and
straightforward.
Most
Cetrek
systems
use
a
plug
and
socket
interconnect
system
that
allow
the
plugs
to
be
simply
removed
if
the
cable
needs
to
