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20

Apply marine sealant between the mounting surface and the 

device to properly seal and prevent leakage behind the 

dashboard.

21

If you will have access to the back of the device, apply 

marine sealant around the cutout.

22

Place the device into the cutout.

23

Secure the device to the mounting surface using the larger 

machine screws 

Æ

 or the included wood screws.

24

Wipe away all excess marine sealant.

25

Install the trim caps by snapping them 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.

• This cable provides one differential NMEA 0183 input and 

output port.

Item

Wire Color

Wire Function

Ê

Red

Power

Ë

Black

Ground (power and NMEA 0183)

Ì

Blue

NMEA 0183 TxA (Out +)

Î

Gray

NMEA 0183 TxB (Out -)

Í

Brown

NMEA 0183 RxA (In +)

Ï

Violet

NMEA 0183 RxB (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 ETHERNET ports on the device each act as a network 

switch. Any compatible device can be connected to any 

ETHERNET 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 to an 

existing

 NMEA 2000 network, 

identify the NMEA 2000 power cable. Only one NMEA 2000 

power cable is required for the NMEA 2000 network to operate 

properly.
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 

3

Summary of Contents for GPSMAP 702 Series

Page 1: ...ork register the new devices Tools Needed Drill Drill bits appropriate for the device and mounting style Mounting Style Drill Bit Sizes Bail with included M4 wood screws 3 2 mm 1 8 in Flush 13 mm 1 2...

Page 2: ...ly in the cutout ensure the mounting holes on the device line up with the larger holes on the template 9 If the mounting holes on the device do not line up mark the new hole locations 10Based on your...

Page 3: ...ditional 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 a...

Page 4: ...to power ground The power cable from the chartplotter and the NMEA 0183 devices must be connected to a common power ground The internal NMEA 0183 ports and communication protocols are configured on th...

Page 5: ...onnecting 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 1 A and a relay is needed to limit th...

Page 6: ...protocol Connection management 060928 ISO address claimed 065240 Commanded address 126208 Request group function 126996 Product information 126998 Configuration information 127237 Heading track contr...

Page 7: ...BT DBT Depth below transducer SDDPT DPT Depth SDMTW MTW Water temperature SDVHW VHW Water speed and heading Receive Sentence Description DPT Depth DBT Depth below transducer MTW Water temperature VHW...

Page 8: ...support garmin com TA 2016 3368 TA 2017 085...

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