In-Line Fuse And Thermal Breaker Ratings; Seatalkng® System Loading; Power Distribution - Seatalkng - Raymarine i60 Installation & Operation Instructions

In-line fuse and thermal breaker
ratings
The SeaTalkng® network's power supply requires an
in-line fuse or thermal breaker to be fitted.
In-line fuse rating
5A
Note: The suitable fuse rating for the thermal
breaker is dependent on the number of devices you
are connecting. If in doubt consult an authorized
Raymarine dealer.
SeaTalkng® system loading
The maximum loading / LEN for a SeaTalkng®
system depends on the length of the backbone.
Loading type Backbone length
Unbalanced 20 m (66 ft)
Unbalanced 40 m (131 ft)
Unbalanced 60 m (197 ft)
Balanced
60 m (197 ft) or
less
Balanced 80 m (262 ft)
Balanced 100 m (328 ft)
Balanced 120 m (394 ft)
Balanced 140 m to 160 m
(459 ft to 525 ft)
Balanced 180 m to 200 m
(591 ft to 656 ft)
Power distribution — SeaTalkng®
Recommendations and best practice.
• Only use approved SeaTalkng® power cables. Do
NOT use a power cable designed for, or supplied
with, a different product.
• See below for more information on implementation
for some common power distribution scenarios.
Important: When planning and wiring, take into
consideration other products in your system, some
of which (e.g. sonar modules) may place large
power demand peaks on the vessel's electrical
system.
Note: The information provided below is for
guidance only, to help protect your product. It
covers common vessel power arrangements, but
does NOT cover every scenario. If you are unsure
how to provide the correct level of protection,
please consult an authorized Raymarine dealer or
a suitably qualified professional marine electrician.
Implementation — direct connection to battery
• SeaTalkng® power cables may be connected
directly to the vessel's battery, via a suitably rated
fuse or breaker.
24
Thermal breaker rating
3 A (if only connecting one
device)
Total LEN
40
20
14
100
84
60
50
40
32
• You MUST fit a suitably rated fuse or breaker
between the red wire and the battery's positive
terminal.
• Refer to the inline fuse ratings provided in the
product's documentation.
• If you need to extend the length of the power
cable, ensure you use suitably rated cable and
that sufficient power (12 V dc) is available at the
SeaTalkng® backbone's power connection.
A
Battery connection scenario A: suitable for a vessel with
a common RF ground point. In this scenario, if your
product's power cable is supplied with a separate drain
wire then it should be connected to the vessel's common
ground point.
B
Battery connection scenario B: suitable for a vessel
without a common grounding point. In this case, if your
product's power cable is supplied with a separate drain
wire then it should be connected directly to the battery's
negative terminal.
Implementation — connection to distribution
panel
• Alternatively, the SeaTalkng® power cable may be
connected to a suitable breaker or switch on the
vessel's distribution panel or factory-fitted power
distribution point.
• The distribution point should be fed from
the vessel's primary power source by 8AWG
(8.36mm 2 ) cable.
• Ideally, all equipment should be wired to individual
suitably-rated thermal breakers or fuses, with
appropriate circuit protection. Where this is not
possible and more than 1 item of equipment
shares a breaker, use individual in-line fuses
for each power circuit to provide the necessary
protection.
• In all cases, observe the recommended
breaker / fuse ratings provided in the product's
documentation.