Raymarine E70141, Инструкция по установке и эксплуатации, Страница: 20 / 70

4.3 Power connection
Power can be supplied to the unit either directly or as part of the
SeaTalk network.
A SeaTalk system requires one 12 V dc supply, connected to the
SeaTalk backbone. This can be provided:
• By a battery via the distribution panel, or
• From a Raymarine course computer, via SeaTalk or SeaTalk
ng
.
Power connection example
Direct power connection
1 3 A circuit breaker or fuse.
2 SeaTalk power cable.
3 12 V dc vessel power supply.
SeaTalk power connection
1
5 A circuit breaker or fuse.
2 12 V dc vessel power supply.
SeaTalk power protection
The power supply must be protected by a 5 A fuse or a circuit
breaker providing equivalent protection.
Raymarine recommends that the power is connected to a SeaTalk
system in such a way that the current drawn on each side of the
power connection point is equal.
Warning: Grounding not required
This product is fully insulated and does NOT require
separate grounding.
Warning: Positive ground systems
Do not connect this unit to a system which has positive
grounding.
SeaTalk power cables
Part number Description
D229 SeaTalk power cable.
Power cable extension (12 V)
The following restrictions apply to any extension to the power cable:
• Cable must be of a suitable gauge for the circuit load.
• Cable must be wired back to the distribution panel.
Total length (max) Cable gauge (AWG)
0 to 5 m (0 to 16.4 ft) 18
5 to 10 m (16.4 to 32.8 ft)
14
10 to 15 m (32.8 to 49.2 ft) 12
15 to 20 m (49.2 to 65.5 ft) 12
SeaTalk accessories
SeaTalk cables and accessories for use with compatible products.
Description Part No Notes
3–way SeaTalk junction
box
D244
1 m (3.28 ft) SeaTalk
extension cable
D284
3 m (9.8 ft) SeaTalk
extension cable
D285
5 m (16.4 ft) SeaTalk
extension cable
D286
9 m (29.5 ft) SeaTalk
extension cable
D287
12 m (39.4 ft) SeaTalk
extension cable
E25051
20 m (65.6 ft) SeaTalk
extension cable
D288
20 i40