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GPSMAP 76 Owner’s Manual 59
APPENDIX > CONNECTING AND INTERFACING
Connecting the Power/Data
The power/data cable connects the GPSMAP 76 to a 8–35
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 - 1.5 Amp fuse.
Interfacing
The following formats are supported for connection of
external devices:
Garmin proprietary Differential GPS (DGPS), NMEA 0183
versions 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, and GPWPL; Proprietary
sentences—PGRME, PGRMZ, and PSLIB. The GPSMAP
76 will accept NMEA input with support for the DBT, DPT,
MTW, and VHW sentences.
You can dowload a copy of Garmin’s proprieatry
communication protocol on the Help and Support section of
our Web site at www.garmin.com
Unit View
Data In
White
Power
Red
Ground
Black
Data Out
Brown
Cable View
Data In
White
Power
Red
Data Out
Brown
Ground
Black
8-35
Brown:DataOut
White:DataIn
Black:Ground
Red:Power
voltsDC
Autopilot/
NMEADevice
GBR21/23
Beacon
Receiver