Raymarine GPS navigation User Manual download pdf (Page 11)

2.3.1 Power Input

The NAV

398

is intended for use on vessels with 12 VDC power systems

and can operate as long as the DC supply is maintained between 10 and 16

volts. The DC power system can be “negative” ground or have both positive

and negative supply lines “floating” above ground. The

NAV 398 is

not

intended

for

use

pas

itiv,a”

pround

ve&

A 6 foot cable assembly containing wiring for the DC power and Data

Output is supplied with your display unit and in many cases will be adequate

to reach near the source of the 12 VDC power.

For best noise immunity

from other shipboard elec-

tronics, if possible, avoid

grouping the power connec-

tions on the same circuit

breaker with radar, radio, or

echo sounder power leads.

The NAV unit’s wiring

should be kept separate as

much as possible from other

devices.

FUSE RED

BROWN

DATA IN

DATA OUT+

DATA OUT-

-12VDC

+WD

DATA IN

Power Cable Wiring Diagram

Although the

NAV

unit’s power consumption is typically less than 5 watts,

if the power leads need to be extended more than 10 feet, the wire size of the

leads should be increased accordingly to minimize line losses. For cable runs

of 20

35 feet #12 AWG wire is recommended.

OBSERVE PROPER POLARITY!

The

RED

wire should be connected to

the POSITIVE (+)

sauce

terminal;

the BLACK wire should be connected to the NEGATIVE

(-)

source

terminal If the power leads are accidentally reversed, the in-line fuse will

blow. If this happens, recheck the polarity of the connections with a voltmeter

(VOM) and, if necessary, reverse the leads for proper connection. Replace

the fuse.

2.3.2 Sensor Connections

The sensor units used with the NAV 398 normally obtain their

12VDC

operating power input from the NAV unit and, when the NAV unit has been

turned ON, the sensors can then proceed to locate and track signals and

INSTALLATION 2-5

1 ... 10 11 12 ... 75

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Raymarine GPS navigation User Manual Page 11

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