Garmin GPSMAP 276C Owner's Manual - Page 111
Installation Information, Connecting the Power/Data Cable
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Installation Information This section of the Appendix provides information on connecting the GPSMAP 276C to auxiliary devices and removing the antenna. Connecting the Power/Data Cable The power/data cable connects the GPSMAP 276C to an 11-35 VDC system and provides interface capabilities for connecting external devices. The color code in the diagram below and to the right indicates the appropriate harness connections. Replacement fuse is a 3AG - 1.5 Amp fuse. Ground Black Alarm White Voice (+) Brown Data In 1 Yellow Voice (-) Orange Data Out 1 Blue Data In 2 Green Power Red Data Out 2 Violet Power/Data Connector on the GPSMAP 276C Unit GPSMAP 276C Owner's Manual Data Out 1 Blue Data In 2 Green Power Red Data Out 2 Violet Appendix > Installation Information Voice (-) Orange Ground Black Alarm White Voice (+) Brown Data In 1 Yellow Power/Data Connector on the Cable Red: Power Black: Ground (-) (+) 11-35 VDC Blue: Data Out Yellow: Data In RXD + Autopilot/ NMEA Device RXD - Switch White/Blue (+) Orange Closed - On, Open - Off (-) GSD 21 Sounder White/Brown 103
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