Raymarine a67, Инструкция по установке и эксплуатации, Страница: 41 / 330

4.4 Power connection — New c Series
and New e Series
D12250-1
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1. Multifunction display connections.
2. Power and data cable.
3. Connection to 12/24 V power supply (e7/e7D is 12V only).
4. Red cable (positive).
5. Fuse.
6. Black cable (negative).
7. Video input cable.
8. NMEA 0183 data cables.
9. Shield (drain) wire (thin black wire; must be connected to
RF ground point).
Power distribution
Raymarine recommends that all power connections are made
via a distribution panel.
• All equipment must be powered from a breaker or switch, with
appropriate circuit protection.
• All equipment should be wired to individual breakers if
possible.
Warning: Product grounding
Before applying power to this product, ensure it has
been correctly grounded, in accordance with the
instructions in this guide.
Grounding — Dedicated drain wire
The power cable supplied with this product includes a dedicated
shield (drain) wire for connection to a vessel's RF ground point.
It is important that an effective RF ground is connected to the
system. A single ground point should be used for all equipment.
The unit can be grounded by connecting the shield (drain) wire
of the power cable to the vessel's RF ground point. On vessels
without an RF ground system the shield (drain) wire 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.
• Floating, with neither battery terminal connected to the
vessel's ground
Warning: Positive ground systems
Do not connect this unit to a system which has
positive grounding.
Power cable
The display is supplied with a combined power and data multi
cable, this can be extended if required.
Power cables available
Cable Part number Notes
1.5 m (4.9 ft) Straight
power and data cable R62379
1.5 m (4.9 ft) Right
angled power and data
cable R70029
Cable extension
The following restrictions apply to any extension to the power
cable:
• Cable must be of a suitable gauge for the circuit load.
• Each unit should have its own dedicated power cable wired
back to the distribution panel.
Total length (max) Supply voltage Cable gauge (AWG)
12 V 18 0–5 m (0–16.4 ft)
24 V 20
12 V 14 5–10 m (16.4–32.8 ft)
24 V 18
12 V 12 10–15 m (32.8–49.2 ft)
24 V 16
12 V 12 15–20 m (49.2–65.5 ft)
24 V 14
Note: These distances are for a 2 wire power cable run from the
battery to the display (approximately the distance from the battery to the
display). To calculate the round trip length, double the figure stated here.
Breakers, fuses and circuit protection
The power cable includes an in-line fuse. It is recommended that
you fit an additional thermal breaker or fuse at the distribution
panel.
Fuse rating Thermal breaker rating
7 A in-line fuse fitted within power
cable. 5 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 authorised Raymarine dealer.
Cables and connections
41