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Connecting the Power/Data
The power/data cable connects the GPSMAP 76S 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 - 2.0 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 76S will accept NMEA input with support for the DPT, MTW, and VHW
sentences.
You can dowload a copy of GARMIN’s proprieatry communication protocol on the
Help and Support section of our website at www.garmin.com
8-35
Brown: DataOut
White: DataIn
Black: Ground
Red: Power
voltsDC
Autopilot/
NMEADevice
GBR21/23
Beacon
Receiver
56
Unit View
Data In
White
Power
Red
Ground
Black
Data Out
Brown
Cable View
Data In
White
Power
Red
Data Out
Brown
Ground
Black
Appendix B
Wiring and Interfacing
190-00249-00_0C.indd 56 5/7/2003, 9:55:00 AM