Raymarine Evolution EV-1, Installation Instructions Manual

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Grounding — Dedicated drain wire required
This product includes a dedicated drain conductor (screen) for connection to a vessel's RF ground
point.
It is important that an effective RF ground is connected to the unit. The unit can be grounded by
connecting the drain conductor (screen) to the vessel's RF ground point. On vessels without an RF
ground system the drain conductor (screen) should be connected directly to the negative battery
terminal.
The dc power system should be either:
• Negative grounded, with the negative battery terminal connected to the vessel's ground; or
• Floating, with neither battery terminal connected to the vessel's ground.
If several items require grounding, they may first be connected to a single local point (e.g. within a
switch panel), with this point connected via a single, appropriately-rated conductor, to the vessel’s
common RF ground point.
Implementation
The preferred minimum requirement for the path to ground is via a flat tinned copper braid, with
a 30 A rating (1/4 inch) or greater. If this is not possible, an equivalent stranded wire conductor
maybe used, rated as follows:
• for runs of <1 m (3 ft), use 6 mm 2 (#10 AWG) or greater.
• for runs of >1 m (3 ft), use 8 mm
2
(#8 AWG) or greater.
In any grounding system, always keep the length of connecting braid or wires as short as possible.
References
• ISO10133/13297
• BMEA code of practice
• NMEA 0400
Power distribution — ACU
Recommendations and best practice.
• The product is NOT supplied with a power cable. Please refer to the Power and drive cables
section for power cable requirements.
• Refer to the Power connection section for more information on how to identify the wires in your
product’s power cable, and where to connect them.
• 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
• The unit may be connected directly to the vessel's battery, via a suitably rated fuse or breaker.
• The unit also requires a separate RF Ground (drain) connection, refer to the following section:
Grounding — Dedicated drain wire required
.
• You MUST fit a suitably-rated fuse or breaker between the red wire and the battery’s positive
terminal. This is required in addition to the internal fuse fitted to the ACU.
• Refer to the table below for suitable fuse ratings.
ACU-200, ACU-300, ACU-400 connections
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