Garmin TR-1 manual NMEA 0183 Connections, Note For non-compliant NMEA, devices, please read page

NMEA 0183 Connections

The Autopilot does not need to connect to a GPS for the autopilot to work, but if you want to use waypoint steering you must connect to a GPS and set North see page 29. The Autopilot will accept NMEA input from two GPS units and transmit NMEA to one receiving device. Only one of the GPS inputs is used for steering control at a time. Selection of the controlling GPS is made through the NMEA source selection [code 34] (see pages 33-35 for explanation of setup codes). The NMEA output port transmits the NMEA sentence $APHDG at 4800 baud. The output refresh rate is selectable via [code 49] from 0 to 10 Hz. The Autopilot requires the data sentences RMC and RMB to be on.

The NMEA conductors are in the cable stub at the base of the Compass Ball. (See Labels on Wires for Identification) The wire color codes and signal names are shown in the wiring diagram below.

You must calibrate the compass ball and set North during Sea Trial of autopilot for it to work correctly.

Note: If you are using Radar Overlay, you may need to adjust code 168 in order for your overlay to line up correctly.

See pages 38-41 for a GPS Connection Guide. Please check your GPS manual for verification of NMEA 0183 connections on your application. This is not a compatibility chart, but most all GPS units are compatible with the TR-1 Gladiator.

		Compass
			Ball
			Drive
	Shadow			Horn
To
		Warning
and		Connectors

	Wire Connectors
NMEA Out {	Red ( +)	( + )	Chart Plotter
	Black (- )	( - )	}Radar Overlay
	Yellow ( + )	( + )	NMEA IN*
NMEA In # 1{			GPS #1
	White ( - )	( - ) }NMEA out*
NMEA In # 2{	Blue ( + )	( + )	GPS #2
	Brown ( - )	( - )	}NMEA
	Green (GND)		out*
		Not normally
To		Used
ECU	*Refer to your specific
#4	electronics manual for
	color codes
Connector			Note: For non-compliant NMEA 0183

devices, please read page 21

Blue Connectors (for connecting wires from the Shadow Drive, Warning Horn and GPS)

Fig. 18 Fig. 19 Fig. 20

Twist wires together. (Fig 18) Slide the blue connectors over the wires (Fig 19) and crimp using pliers as in Fig 20. Be careful not to smash the connectors too hard, it will cut the wires.

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