Garmin GPSMAP 740s - Manual (Page 4)

 GPSMAP 700 Series Installation Instructions
Installing the Power/Data Cable
The chartplotter comes with a power/data cable that connects the chartplotter to power and to optional
NMEA 0183 devices. If applicable, the power/data cable also connects the chartplotter to a sonar transducer.
The power/data cable does not connect the chartplotter to a NMEA 2000 network. For instructions on
connecting the chartplotter to a NMEA 2000 network, see page 6 .
To help make the cable-routing process easier, the locking ring is packaged separately from the cable. If you
install the power/data cable through the bail mount, do not install the locking ring until after all the cables
are routed.
Installing a locking ring on the cable:
1. Route the cable away from sources of electronic interference so that the cable connector is at the
mounting location of the chartplotter.
2. Separate the two halves of the locking ring.
3. Align the two halves of the locking ring over the cable and snap them together.
4. Insert the O-ring into the end of the connector.
GPSMAP 700 Series Power/Data Cable
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To transducer (if applicable)
Red
Black
Accessory on
Blue
Spare
Spare
Alarm low
Wire Color Wire Function
Power (10– Vdc)
Ground
(power and NMEA 018)
NMEA 018 port 1 Tx (out)
Brown
Gray
Violet
Green
White
Orange
Yellow
To the GPSMAP 700
series chartplotter
Fuse A
NMEA 018 port 1 Rx (in)
NMEA 018 port  Tx (out)
NMEA 018 port  Rx (in)
Notes:
Use an AGC/ 3AG - 3 Amp replacement fuse.
If it is necessary to extend the power and ground wires, use 16 AWG wire.
You can wire the cable directly to the battery, or if your boat has an electrical system, you might be able to wire the cable to an unused
holder on the fuse block. If you use the boat fuse block, remove the in-line fuse holder on the power wire of the cable.
Do not cut the transducer cable, because this voids your warranty.
Notice
The maximum input voltage is 32 Vdc. Do not exceed this voltage because this can damage the chartplotter and void the warranty.
NOTE: If you are not connecting the chartplotter to NMEA 0183 devices, use only the red and black wires. The other wires do not have to be
connected for normal operation of the chartplotter. For information on connecting to a NMEA 0183-compatible device, see page 5.
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Installing the Locking Ring Installing the Locking Ring