Connecting SeaTalkng® cables
1.
Rotate the locking collar on the unit to the unlocked
position.
2. Ensure the cable’s connector is correctly oriented.
3. Fully insert the cable connector.
4. Rotate locking collar clockwise (2 clicks) until it is in
the locked position.
SeaTalkng® product loading
The number of products that can be connected to
a SeaTalkng® backbone depends on the power
consumption of each product and the physical overall
length of the backbone.
SeaTalkng® products have a Load Equivalency
Number (LEN), which indicates the product’s power
consumption. The LEN for each product can be found
in the product’s Technical Specification.
4.3 SeaTalkng® power supply
Power is supplied to the product over the SeaTalkng®
backbone.
A SeaTalkng® backbone requires one 12 V dc power
supply, connected to the SeaTalkng® backbone. This
can be provided by:
• a battery
(1)
, via the distribution panel,
• an Autopilot Control Unit (ACU)
(2)
,
• an SPX course computer
(2)
,
• for 24 V vessels a 5 amp, regulated, continuous 24 V
dc to 12 V dc converter is required.
Note:
• (1) The battery used for starting the vessel’s
engine(s) should NOT be used to power the
SeaTalkng® backbone as this can cause sudden
voltage drops, when the engines are started.
• (2) The ACU-100 and SPX-5 cannot be used to
power the SeaTalkng® backbone.
SeaTalkng® power connection point
Small systems
If the backbone length is 60 m (197 ft) or less, the
power connection point may be connected at any point
in the backbone.
Large systems
If the backbone length is greater than 60 m (197 ft),
the power connection point should be connected at a
point that creates a balanced current draw from each
side of the backbone. The Load Equivalency Number
(LEN) is used to determine the power connection point
for the system.
In the example above the system has an overall LEN of
10, so the optimum connection point would be to have
5 LEN either side of the connection point.
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.
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