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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
Identi cation) 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 veri cation 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.
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.
Fig. 19
Blue Connectors (for connecting wires from the Shadow Drive, Warning Horn and GPS)
Fig. 18
Fig. 20
*Refer to your speci c
electronics manual for
color codes
Compass
Ball
Red ( +)
Black (- )
Green (GND)
Yellow ( + )
White ( - )
Blue ( + )
Brown ( - )
NMEA Out
NMEA In # 1
NMEA In # 2
Chart Plotter
Radar Overlay
NMEA IN*
GPS #1
NMEA out*
{
{
{
}
}
}
GPS #2
NMEA
out*
Not normally
Used
Wire Connectors
( + )
( + )
( + )
( - )
( - )
( - )
To ECU #4 Connector
To Shadow Drive
and Warning Horn
Connectors
Note: For non-compliant NMEA 0183
devices, please read page 21