Seatalkng ® Power Supply; Seatalkng ® Power Connection Point - Raymarine AR200 Installation Instructions Manual

4.3 SeaTalkng ® power supply
Power is supplied to the product over the SeaTalkng ® backbone.
A SeaTalkng ® backbone requires only one 12 V dc power supply, connected to the SeaTalkng ®
backbone. This can be provided by one of the following:
• a battery (1) , via the distribution panel;
• an Autopilot Control Unit (ACU)
• an SPX course computer
• 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, ACU-150 or SPX-5 products 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.
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(2) ;
(2) ;