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

8.4 SeaTalkng ® power supply
Your product is supplied power via the SeaTalkng ® backbone.
A SeaTalkng ® backbone requires a single 12 V dc power supply. Power can be supplied to the
SeaTalkng ® backbone by one of the following methods:
• (1) direct connection to a 12 V dc battery
• connection via a 12 V dc distribution panel
• (2) via an Autopilot Control Unit (ACU) (not ACU-100 or 150), or an SPX course computer (not SPX-5)
that is connected to the SeaTalkng ® backbone.
• for 24 V vessels, via a 5 amp, regulated, continuous 24 V dc to 12 V dc converter
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.
The SeaTalkng ® power cable (A06049) is used to connect the SeaTalkng backbone to your chosen
12 V dc power supply.
SeaTalkng ® power connection point
The 12 V dc power supply is connected to a spur connection on the SeaTalkng ® 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 NMEA 2000
Load Equivalency Number (LEN) is used to determine the power connection point for the backbone.
In the example above the backbone has an overall LEN of 10, so the optimum connection point would
be to have 5 LEN either side of the connection point.