Garmin GNX 20 Installatie-instructies - Pagina 2

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Securely fasten the marine instrument to the mounting

surface using the supplied screws.

If you are mounting the marine instrument in fiberglass, use a

anti-galling lubricant as advised in the notice.

Snap the bezel

into place.

Connection Considerations

The marine instrument connects to power and to data sources

through a NMEA 2000 network. In addition, the marine

instrument can connect to a NMEA 0183 data source using a

data cable (not included).

NMEA 2000 Connection Considerations

If you have an existing NMEA 2000 network on your boat, it

should already be connected to power. Do not connect the

NMEA 2000 power cable to an existing NMEA 2000 network,

because only one power source should be connected to a

NMEA 2000 network.

If you are installing the included NMEA 2000 power cable, you

must connect it to the boat ignition switch or through another in-

line switch. NMEA 2000 devices will drain your battery if the

NMEA 2000 power cable is connected to the battery directly.

The marine instrument connects to a NMEA 2000 network on

your boat using the port labeled NMEA 2000. The NMEA 2000

network provides power to the marine instrument and data from

NMEA 2000-compatible devices such as a wind sensor. The

included NMEA 2000 cables and connectors allow you to either

connect the device to your existing NMEA 2000 network or

create a basic NMEA 2000 network if needed.

If you are unfamiliar with NMEA 2000, you should read the

"NMEA 2000 Network Fundamentals" chapter of the Technical

Reference for NMEA 2000 Products. To download the

reference.

NOTICE

Item

Description

Wind sensor

Marine instrument

Ignition or in-line switch

NMEA 2000 power cable

NMEA 2000 drop cable

12 Vdc power source

NMEA 2000 terminator or backbone cable

NMEA 2000 T-connector

NMEA 2000 terminator or backbone cable

NMEA 0183 Connection Considerations

• The marine instrument can receive NMEA 0183 data from

one device using a NMEA data cable (not included), but it

cannot transmit data from the NMEA 0183 device to the

NMEA 2000 network.

• If you are replacing a legacy Garmin marine instrument that

currently uses a NMEA data cable, you do not need to

purchase a new data cable, but you might need to replace the

quarter-turn locking ring with a threaded locking ring.

• The installation instructions provided with your NMEA 0183

compatible device should contain the information you need to

identify the transmitting (Tx) A (+) and B (-) wires.

• When connecting NMEA 0183 devices with two transmitting

wires, it is not necessary for the NMEA 2000 bus and the

NMEA 0183 device to connect to a common ground.

• When connecting a NMEA 0183 device with only one

transmitting (Tx) wire, the NMEA 2000 bus and the NMEA

0183 device must connect to a common ground.

• For extended runs, you should use at least 0.33 mm

(22 AWG) wire.

• You must solder and seal all connections with heat-shrink

tubing.

Wire Color Wire Function

Red

A red wire is present only on some variations of the data

cable, and should not be connected.

Black

Accessory (-). This wire is used only when connecting the

marine instrument to a Garmin HVS GPS antenna.

Yellow

Accessory (+). This wire is used only when connecting the

marine instrument to a Garmin HVS GPS antenna.

Blue

Tx/A (+). This wire is used only when connecting the

marine instrument to a Garmin HVS GPS antenna.

White

Tx/B (-). This wire is used only when connecting the

marine instrument to a Garmin HVS GPS antenna.