mcmurdo NAV-7, Руководство пользователя и инструкция по установке

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Page 28
Electrical Connections
This manual is concerned only with the installation of the NAV-7 and does not cover
the installation of peripheral equipment connected to the NAV-7 such as printers,
navigational systems or source of NMEA data in detail. For proper installation and
connection of peripheral equipment refer to the installation manuals for these
products.
The table below shows the connections that must be made to the NAV-7 for it to
function correctly.
Connection Must connect Optional
Ship’s earth connection
12V or 24 V DC power supply
NAVTEX antenna
Alarm Relay
NMEA or IBS UTC (time) reference See Note 1 See Note 1
Integrated Bridge/Navigation System
External printer
Note 1:
Connecting a UTC (time) reference (eg a GPS receiver) is highly
recommended.
Ship’s earth connection
The earth terminal on the rear of the NAV-7 display must be connected to ship’s
ground by the earth cable supplied. The earth connection should be kept as short as
possible.
12V or 24 V DC power connection
A connection must be made to a 12 or 24 V DC supply via a circuit breaker capable of
supplying at least 2 amps. Connection should be to the ship’s radio battery and be in
accordance with GMDSS requirements.
•
Connections should be made using the 2 m power cable provided
Safety Warning
To ensure the best possible protection of the NAV-7 from static
electricity or nearby lighting strikes, the pre-fitted green
grounding wire (connected to the safety earth spade) must be
connected to a nearby (hull) electrical grounding point.