Garmin GSD 21 Serial Wiring for the Garmin GSD 21 to a Single GPSMAP 276C/296/376C/396

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Module Sonar 21 GSD

Serial Wiring for the Garmin GSD 21 to a Single GPSMAP 276C/296/376C/396

	WIRE		WIRE		GARMIN GSD 21
	COLOR		COLOR
FUSE				FUSE	SOUNDER MODULE
1.5A	RED		RED	2A
	BLACK		BLACK
	BLUE		WHITE/BLUE
	YELLOW		WHITE/BROWN		TO
			ORANGE		TRANSDUCER
		SEE NOTE 3
	ON	OPTION 1
	OFF
			ON OFF
			SEE NOTE 3
			OPTION 2
		BATTERY
		10-35 VOLTS DC

Notes:

1.You can extend the serial/power wiring of the GSD 21 power/data cable up to 100 ft (30 m) total length. Use the CANet Extension Cable or 22 AWG, 4-conductor shielded cable for data connections and 18 AWG for power.

2.Ground the drain wire at the display unit. Do not ground the drain wire on the sonar unit.

3.The Orange wire must be pulled low (-) in order for the GSD 21 to power on.

Option 1: If the GSD 21 is wired to a circuit that is switched on the Red (+) wire, connect the Orange wire to ground. The GSD 21 and the GPSMAP 276C/296/376C/396 turn on or off when power is applied or removed form the Red wire.

Option 2: If the Red (+) wire is applied directly to a power source, install a switch between the Orange wire and ground. The GSD 21 turns on or off when ground is applied or removed from the Orange wire.

4.When crimping the 3-wire connector, use a standard pair of pliers and make sure the button is fully depressed into the connector.

NSTRUCTIONSI NSTALLATIONI