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
Thermal breaker rating
5 A
3 A (if only connecting one device)
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
Total LEN
Unbalanced
20 m (66 ft)
40
Unbalanced
40 m (131 ft)
20
Unbalanced
60 m (197 ft)
14
Balanced
60 m (197 ft) or less
100
Balanced
80 m (262 ft)
84
Balanced
100 m (328 ft)
60
Balanced
120 m (394 ft)
50
Balanced
140 m to 160 m (459 ft to 525 ft) 40
Balanced
180 m to 200 m (591 ft to 656 ft) 32
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.
• 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.
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