Garmin CS 1522 Owner's Manual page 26

NMEA 0183 Device Connected with a Single Transmit Wire
In this example, the NMEA 0183 device is sending data to the chartplotter.
B
Item
DC Power supply / battery
A
Power / NMEA 0183 cable
B
NMEA 0183 device
C
Item
Red
Black
Violet
Brown
NMEA 0183 and Power Cable Pinout
Pin
Gray
Black
Blue
Brown
Yellow
Red
Violet
Orange
24
Garmin Wire Color
Wire Color
A
Description
Garmin Wire Function
Power
Power ground
RXB
RXA
Wire Function
NMEA TXB
Ground / Power supply -
NMEA TXA
NMEA RXA
Alarm
Power supply +
NMEA RXB
Accessory on
C
NMEA 0183 Device
Wire Function
Power
Power ground
N/A
TXA
CHAPTER 1 INTRODUCTION