Wiring And Interfacing; Connecting The Power/Data Cable; Interfacing - Garmin GPSMAP 296 Pilot's Manual

Connecting the Power/Data Cable

The power/data cable connects the GPSMAP 296 to an 11–35-Volt DC system and provides interface
capabilities for connecting external devices. The color code in the diagram below indicates the appropri-
ate harness connections. Replacement fuse is a 3AG - 1.5 Amp fuse.

Interfacing

The following formats are supported for connection of external devices: GARMIN proprietary Dif-
ferential GPS (DGPS), NMEA 0180, 0182, 0183 (versions 1.5, 2.0, 2.3, 3.01), ASCII Text Output, and
RTCM SC-104 input (version 2.0).
The following are the Approved Sentences for NMEA 0183, version 3.01 output: GPRMC, GPGGA,
GPGSA, GPGSV, GPGLL, GPBOD, GPRTE, and GPWPL. The following are the Proprietary Sentences for
NMEA 0183, version 3.01 output: PGRME, PGRMZ, and PGRMM.
The GPSMAP 296 also includes NMEA input with support for the BWC, DBT, DPT, MTW, VHW,
VTG, and XTE sentences.
Garmin' s proprietary communication protocol is available from the Web site (www.garmin.com).
Red: Power
(-)
Black: Ground
11–35V DC
RXD +
Autopilot/
NMEA Device
RXD -
Blue: Data Out 1
Brown
GBR 23
(-)
Beacon
Yellow: Data In 1
Blue
Receiver

Wiring and Interfacing

Ground
Black
Alarm
(+)
White
Voice (+)
Brown
Data In 1
Yellow
(+)
Data Out 1
Blue
Data In 2
Green
Power
Red
Data Out 2
Violet
Appendix
Voice (-) Data Out 1
Orange Blue
Data In 2
Green
Power
Red
Data Out 2
Violet
Unit Power/Data Connector
Ground
Voice (-)
Black
Orange
Alarm
White
Voice (+)
Brown
Data In 1
Yellow
Power/Data Cable Connector
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