Seatalkng® System Loading; Power Distribution - Seatalkng - Raymarine Micro-Talk E70361 Installation Manual

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.
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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
Total LEN
consult an authorized Raymarine dealer or a suitably
qualified professional marine electrician.
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Implementation — direct connection to battery
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• SeaTalkng® power cables may be connected directly
to the vessel's battery, via a suitably rated fuse or
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breaker.
• You MUST fit a suitably rated fuse or breaker between
the red wire and the battery's positive terminal.
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• Refer to the inline fuse ratings provided in the
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product's documentation.
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• If you need to extend the length of the power cable,
ensure you use suitably rated cable and that sufficient
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power (12 V dc) is available at the SeaTalkng®
backbone's power connection.
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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 8 AWG (8.36 mm
• 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.
• 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.
Important: Be aware that the suitable fuse rating
for the thermal breaker or fuse is dependent on the
number of devices you are connecting.
2 ) cable.