INSTALLATION
MANUAL
© Scania CV AB 2017, Sweden
Connection
03:04 Issue 2.0 en-GB 8
Connection
Electrical cables
To protect against electromagnetic interference, Scania recommends that all electri-
cal cables within the system are twisted in pairs with 35-40 turns/m. This only applies
to external signal cables connected to the system.
If a shielded electrical cable is used, the shielding should be connected to ground, not
to 0 V. Connect pin 3 in harness-to-harness connector C1 of the main display to
ground. See Main display (DCU), connections
. Only connect the shielding to one
end of the electrical cable.
To provide good separation of the electromagnetic interference that can occur, some
of the electrical cables can be routed separately from the others, e.g. the signal cable
from a magnetic pulse sensor. The electrical cables for the auxiliary display electric
power supply must have a cross-sectional area of at least 1.5 mm
2
and be connected
to a fuse of their own, powered directly from the battery. The main display receives
its electric power supply from the junction box.
Ground
Separate ground and 0 V. In marine installations, ground and 0 V must not be con-
nected. The hull is ground and the battery negative terminal is 0 V.
24 V and 0 V are filtered in the main display in order to reduce electromagnetic in-
terference. If ground and 0 V are connected together, the filters in the main display
will not function.
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