These diagrams illustrate basic NMEA^® 0183 wiring used to connect your device to NMEA 0183-compliant devices. For more information on the NMEA 0183 capabilities of the device, see Advanced NMEA 0183 Connections.

Item	Description
	12 Vdc power source
	Power cable
	NMEA 0183-compliant device
	NMEA 0183 cable

Item	Garmin Wire Function	Garmin Wire Color	NMEA 0183 Device Wire Function
	Power	Red	Power
	Power ground	Black	Power ground
	Data ground	Black	Data ground
	Receive A (+)	White	Transmit A (+)
	Receive B (-)	Orange/white	Transmit B (-)
	Transmit A (+)	Gray	Receive A (+)
	Transmit B (-)	Pink	Receive B (-)

• If the NMEA 0183-compliant device has only one input (RX) wire (no A, B, +, or -), leave the pink wire unconnected.

• If the NMEA 0183-compliant device has only one output (TX) wire (no A, B, +, or -), connect the orange/white wire to ground.

• Consult the installation instructions of your NMEA 0183-compliant device to identify the output A(+) and B(-) wires and input A(+) and B(-) wires.

• Use 28 AWG, shielded, twisted-pair wiring for extended runs of wire.

• Solder all connections and seal them with heat-shrink tubing.