background image

22

Place the device into the cutout.

23

Secure the device to the mounting surface using the included 

M4 screws 

Æ

.

24

Wipe away all excess marine sealant.

25

Install the decorative bezel by snapping it in place around the 

edges of the device.

Cable and Connection Considerations

• The cables may have been packaged without the locking 

rings installed. If so, you should route the cables before you 

install the locking rings.

• After connecting a locking ring to a cable, make sure the ring 

is securely connected and the O-ring is in place so the 

connection remains secure.

Power/NMEA

®

 0183 Cable

• The wiring harness connects the device to power, NMEA 

0183 devices, and a lamp or a horn for visible or audible 

alerts.

• If it is necessary to extend the NMEA 0183 or alarm wires, 

you must use 22 AWG (.33 mm²) wire.

Item

Wire Color

Wire Function

Ê

Red

Power

Ë

Black

Ground (power and NMEA 0183)

Ì

Blue

NMEA 0183 internal port 1 Tx (out)

Í

Brown

NMEA 0183 internal port 1 Rx (in)

Î

Gray

NMEA 0183 internal port 2 Tx (out)

Ï

Violet

NMEA 0183 internal port 2 Rx (in)

Ð

Orange

Accessory on

Ñ

Yellow

Alarm low

Connecting the Wiring Harness to Power

 WARNING

When connecting the power cable, do not remove the in-line 

fuse holder. To prevent the possibility of injury or product 

damage caused by fire or overheating, the appropriate fuse 

must be in place as indicated in the product specifications. In 

addition, connecting the power cable without the appropriate 

fuse in place voids the product warranty.

1

Route the wiring harness to the power source and to the 

device.

2

Connect the red wire to the positive (+) battery terminal, and 

connect the black wire to the negative (-) battery terminal.

3

If necessary, install the locking ring and O-ring on the end of 

the wiring harness.

4

Insert the cable into the POWER connector on the back of 

the device, pushing firmly.

5

Turn the locking ring clockwise to attach the cable to the 

device.

Additional Grounding Consideration

This consideration is applicable only to devices that have a 

grounding screw. Not all models have a grounding screw.
This device should not need additional chassis grounding in 

most installation situations. If you experience interference, the 

grounding screw on the housing can be used to connect the 

device to the water ground of the boat to help avoid the 

interference.

Garmin Marine Network Considerations

NOTICE

A Garmin Power over Ethernet (PoE) Isolation Coupler (P/N 

010-10580-10) must be used when connecting any third-party 

device, such as a FLIR

®

 camera, to a Garmin Marine Network. 

Connecting a PoE device directly to a Garmin Marine Network 

chartplotter damages the Garmin chartplotter and may damage 

the PoE device. Connecting any third-party device directly to a 

Garmin Marine Network chartplotter will cause abnormal 

behavior on the Garmin devices, including the devices not 

properly turning off or the software becoming inoperable.
This device can connect to additional Garmin Marine Network 

devices to share data such as radar, sonar, and detailed 

mapping. When connecting Garmin Marine Network devices to 

this device, observe these considerations.
• All devices connected to the Garmin Marine Network must be 

connected to the same ground.

• A Garmin Marine Network cable must be used for all Garmin 

Marine Network connections.

◦ Third-party CAT5 cable and RJ45 connectors must not be 

used for Garmin Marine Network connections.

◦ Additional Garmin Marine Network cables and connectors 

are available from your Garmin dealer.

• The NETWORK ports on the device each act as a network 

switch. Any compatible device can be connected to any 

NETWORK port to share data with all devices on the boat 

connected by a Garmin Marine Network cable.

NMEA 2000

®

 Considerations

NOTICE

If you are connecting this device to an existing NMEA 2000 

network, the NMEA 2000 network 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 connecting this device to an existing NMEA 2000 

network or engine network by another manufacturer, you should 

install a NMEA 2000 Power Isolator (010-11580-00) between 

the existing network and the Garmin devices.
If you are installing a 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.
This device can connect to a NMEA 2000 network on your boat 

to share data from NMEA 2000 compatible devices such as a 

GPS antenna or a VHF radio. The included NMEA 2000 cables 

and connectors allow you to connect the device to your existing 

NMEA 2000 network. If you do not have an existing NMEA 2000 

network you can create a basic one using cables from Garmin.
If you are unfamiliar with NMEA 2000, you should read the 

“NMEA 2000 Network Fundamentals” chapter of the 

Technical 

Reference for NMEA 2000 Products

. You can find this document 

using the “Manuals” link on the product page for your device at 

www.garmin.com

.

3

Summary of Contents for GPSMAP 7400 Series

Page 1: ...ted with the memory card and select Next Finish Updating the Device Software Before you can update the software you must obtain a software update memory card or load the latest software onto a memory...

Page 2: ...on the template to prepare the mounting surface for cutting 4 Using a jigsaw or a rotary tool cut the mounting surface along the inside line on the template 5 Place the device in the cutout to test th...

Page 3: ...ecting any third party device such as a FLIR camera to a Garmin Marine Network Connecting a PoE device directly to a Garmin Marine Network chartplotter damages the Garmin chartplotter and may damage t...

Page 4: ...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...

Page 5: ...rk Connecting more than one chartplotter to one engine network may result in unexpected behavior The port labeled J1939 is used to connect the device to the existing engine network You must route the...

Page 6: ...report 129039 AIS class B position report 129040 AIS class B extended position report 129539 GNSS DOPs Type PGN Description 129794 AIS class A static and voyage related data 129809 AIS class B CS stat...

Page 7: ...t conditions 1 65271 Vehicle electrical power 65279 Water in fuel indicator 65272 Transmission fluids 1 65248 Vehicle distance 65266 Fuel economy liquid 65276 Dash display 65226 Active diagnostic trou...

Page 8: ...2016 2017 Garmin Ltd or its subsidiaries support garmin com...

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