Garmin GPSMAP 168 Sounder User Manual

Page 106

10-18 Volt Boat Supply

Appendix G

Wiring and
Interfacing

Connecting the Power/Data

The power/data cable connects the GPSMAP 168 Sounder to a 10-18 volt DC system and provides

interface capabilities for connecting external devices. The color code in the diagram below indicates the
appropriate harness connections. Replacement fuse is a AGC/3AG - 2 Amp fuse.

Interfacing

The following formats are supported for connection of external devices: GARMIN proprietary

Differential GPS (DGPS), NMEA 0183 (version 2.3), ASCII Text Output, RTCM SC-104 input (version
2.0).

The following are the sentences for NMEA 0183, version 2.3 output: Approved sentences—

GPRMC, GPGGA, GPGSA, GPGSV, GPGLL, GPBOD, GPRTE, GPWPL, SDDBT, SDDPT, SDMTW
and SDVHW; Proprietary sentences— PGRME, PGRMZ, and PSLIB. The GPSMAP 168 Sounder also
includes NMEA input with support for the WPL sentence.

You can download a copy of GARMIN's proprietary communication protocol from the Help and

Support section of our website at www.GARMIN.com.

Note: During a typical installation, only the Red and
Black wires are used. The other wires do not have to
be connected for normal operation of the unit.

)

If your boat has an electrical
system, it may be possible
to wire the unit directly to
an unused holder on your
current fuse block. If you are
using the boat’s fuse block,
remove the in-line fuse holder
supplied with the unit.
If your boat does not have
a fuse block, the unit can be
wired directly to the battery.
Make sure the 2-Amp in-line
fuse supplied with the unit is
installed.

Install
2-Amp
Fuse

Boat
Ground

Black Wire

Red Wire

Complete information concerning NMEA

formats and sentences is available for

purchase from NMEA at:

NMEA

Seven Riggs Avenue

Severna Pard, MD 21146

410 975-9425

410 975-9450 (fax)

www.nmea.org

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