Raymarine Evolution EV-1, Installation Instructions Manual

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4. Rotate the locking collar clockwise (2 clicks) until it is in the locked position.
9.4 Power connection — EV-1
The power for the EV-1 unit is provided by the SeaTalkng ® backbone.
• The EV-1 unit must be connected to a spur connection on the SeaTalkng ® backbone.
• SeaTalkng ® requires ONE 12 V dc power source. This can be provided by:
– A battery
– An Evolution ACU–200, ACU-300 or ACU-400 providing power to the same SeaTalkng ®
backbone.
If your vessel has a 24 V supply a suitable voltage convertor is required.
Warning: Positive ground systems
Do not connect this unit to a system which has positive grounding.
9.5 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.
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