Bedienungsanleitung Garmin GPSMAP 7412 (Seite 4 von 8) (Englisch)

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The port labeled NMEA 2000 is used to connect the device to a

standard NMEA 2000 network.

Item Description

NMEA 2000 compatible Garmin device

GPS antenna

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

• See the installation instructions for the NMEA 0183 device to

identify the transmit (Tx) A (+) and B (-) wires and receive

(Rx) A (+) and B (-) wires.

• Each internal Rx and Tx port has 2 wires, labeled A (+) and B

(-) according to the NMEA 0183 convention. The

corresponding A (+) and B (-) wires of each internal port

should be connected to the A (+) and B (-) wires of the NMEA

0183 device. See the table and wiring diagrams when

connecting the data cable to NMEA 0183 devices.

• You must use 28 AWG, shielded, twisted-pair wiring for

extended runs of wire. Solder all connections and seal them

with heat-shrink tubing.

• See NMEA 0183 Information, page 6 for a list of the

approved NMEA 0183 sentences that are output by and input

to your device.

• The internal NMEA 0183 ports and communication protocols

are configured on the connected Garmin device. See the

NMEA 0183 section of the chartplotter owner's manual for

more information.

• The ground wires on the NMEA 0183 data cable and your

NMEA 0183 device must both be connected to ground.

• When connecting NMEA 0183 devices with two transmitting

and two receiving wires, it is not necessary for the NMEA

0183 devices to connect to a common ground.

• When connecting a NMEA 0183 device with only one

transmitting (Tx) wire or with only one receiving (Rx) wire, the

NMEA 0183 devices must be connected to a common

ground.

• For two-way communication with a NMEA 0183 device, the

internal ports on the NMEA 0183 data cable are not linked.

For example, if the input of the NMEA 0183 device is

connected to the internal output port 1 on the data cable, you

can connect the output port of your NMEA 0183 device to

any of the internal input ports (port 1, port 2, port 3, or port 4)

on the wiring harness.

• There are four internal NMEA 0183 input ports (Rx ports),

and two internal NMEA 0183 output (Tx ports) on the

included NMEA 0183 data cable. You can connect one

NMEA 0183 device per internal Rx port to input data to your

Garmin device, and you can connect up to three NMEA 0183

devices in parallel to each internal Tx port to receive data

output by your Garmin device.

NMEA 0183 Connection Diagram

Item Description

12 Vdc power source

Wiring harness

NMEA 0183 compliant device

Item Garmin Wire

Function

Garmin Wire

Color

NMEA 0183 Device Wire

Function

Power Red Power

Ground Black Data ground

Tx/Rx Tx/Rx/B (-)

Tx Blue Rx/A (+)

Rx Brown Tx/A (+)

Lamp or Horn Connections

The device can be used with a lamp, a horn, or both, to sound or

flash an alert when the chartplotter displays a message. This is

optional, and the alarm wire is not necessary for the device to

function normally. When connecting the device to a lamp or

horn, observe these considerations.

• The alarm circuit switches to a low-voltage state when the

alarm sounds.

• The maximum current is 100 mA, and a relay is needed to

limit the current from the chartplotter to 100 mA.

• To manually toggle visual and audible alerts, you can install

single-pole, single-throw switches.

Item Description

Power source

Power cable

Horn

Lamp

Relay (100 mA coil current)

Toggle switches to enable and disable lamp or horn alerts

Item Wire Color Wire Function

Red Power

Black Ground

Yellow Alarm

Video Input and Output Considerations

This device allows video input from composite video sources

and video output to a monitor, depending on the model. When

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Garmin GPSMAP 7412 Seite 4

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