Seiwa SW AP03 - Manual (Page 31)

3.2 CONTROLLER
The Controller may be mounted in any convenient position. Although the front of the
controller is weather-proofed, it should not be mounted where it is exposed directly to
rain or spray. The cable plug and socket at the rear of the case are not weather-
proofed.
It must be flush-mounted, cut the surface according to the cut out. The Controller is
simply fixed from the rear.
Lay the Controller cable back to the Junction Box, feed it through a grommet into the
case and terminate the wires and cable screen in the Controller plug. Tighten each
grub-screw firmly. If the cable is to be shortened, cut it at the end closest to the
Junction Box, since the plug connection at the Controller end cannot be re-made.
Allow enough spare cable length to accommodate a change in the component
positions at some later date. After cutting, strip each wire before connecting it as shown
in Fig 3.3. Check that the insulation is not caught in the terminal clamps and
plug the
cable into the socket at the rear of the Controller case.
Figure 3.3 Controller cable connections.
To minimise the risk of radio interference, the Controller cable, like the others, must be
kept well separated from antennas and antenna feeds. On some vessels this is difficult
to do, but some extra effort to maintain separation will reduce problems in the future.
3.3 COMPASS
The performance of the compass affects the performance of the whole system and
some care should be taken in locating it in the best position. If a compass slave,
mounted on the glass face of the ship’s flat top compass, is being used, performance
is mainly dictated by the accuracy of the ship’s compass.
Ideally, the compass should be mounted at the roll centre of the vessel, at or slightly
above the waterline. The unit may be damaged by long-term exposure to water and
must be above the bilge level. It should be at least 1 metre away from the engine and
from other objects with strong magnetic fields such as loudspeakers and wiring which
carry large currents. In timber, fibreglass or aluminium hulls, these conditions should
be easily met.
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29
WHITE
BLACK
RED
GREEN
BLACK
SCREEN
CABLE
GREEN
RED
CONTROLLER
BLUE
BLUE
WHITE
SCREEN