ComNav Vector G2 & G2B Installation & Operation Wiring
Cable Usage
All cables can potentially be used on all generations of the Vector G2.
For the 15 metre cable supplied on the first-generation G2s (marking 051-0063-003), there
are several black coloured signal wires, each carrying a different signal – which can be very
confusing.
To help prevent wiring errors caused by “many black wires”, all the wires in this cable are
twisted in pairs, with each black wire paired with its respective non-black coloured
counterpart. Each pair is also held together by a short piece of tubing, just after they exit
from the cable’s overall jacket. If you must cut type 051-0063-003, be sure to maintain the
signal wire pairings.
For all the other cable types, the second colour listed in the table below is either repeated
bands of the colour, or a thin spiralling stripe of that colour. The wires are twisted in pairs
(but without any pair-retaining tubing).
Caution! The coloured “stripe” is either repeated bands of the colour, or a thin spiralling
stripe. The stripe can be very hard to see (especially the Blue, Green & Brown
stripes, all on Black backgrounds); please inspect the wires carefully, under a good
light, to be sure you are using the right wires!
Note: the Colour Code information in the wiring diagrams (see Figure
1, Figure 3 &
Figure
4) shows only the colour codes of the cable types currently supplied with the
Vector (cable type numbers 051-0157-002 & 051-0158-0001 – see the 3
rd
column in
Table 2 above).
For the earlier cable types, listed in the 1
st
& 2
nd
columns of Table 2, please use the
colours in either the 1
st
or 2
nd
column (whichever applies) that match the signals you
are using, instead of the colours shown in the Installation chapter.
Note: because there are differences – with respect to the output data signals – between
the first and subsequent generations of the Vector, the signals available on the cable
depend on both the cable type and the Vector’s generation.
L
L
If the older cable types are used with a second-generation Vector G2 & G2B, the
Alarm output is not provided!
Power Input
A 3 Amp fast-blow fuse or circuit breaker (not supplied) should be installed in series with the
Power Input wire. An in-line On/Off switch (not supplied) capable of handling 3 Amps should
also be installed (if a breaker is installed, it may be permissible at your locale to use it as the
On/Off switch).
The breaker/fuse/switch and all the power wiring must be done in accordance with the
applicable electrical safety standards for “low-voltage DC” wiring at your locale.
Please be sure to use adequate wire sizes for the expected maximum currents.
Caution! The Vector G2’s power supply is protected against reverse polarity power
input; the G2 will not operate with reverse polarity, however.
Note: the G2’s power supply is isolated from all the data communication lines. As well,
the plastic enclosure isolates the G2’s circuitry galvanically from the vessel – which
helps reduce hull electrolysis problems.
It is strongly recommended that the G2’s power wiring be run directly from the
power supply – especially for 12 Volt systems. The minimum supply voltage is
specified as 11 Volts, at the loose-wire end of the G2’s cable. On a “12 Volt”
battery system, it is possible (if the battery is weak or partially discharged, and if
there are other loads along the wiring from the battery to the end of the G2’s
cable) that the cable-end voltage will drop below 11 Volts. In such
circumstances, the G2 may exhibit erratic behaviour, such as periodic resetting.
Document PN 29010078 V1.6 (Addendum #1) - 4 -
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