Garmin GMA 240 installation manual 4.5.8Tel Audio I/O

4.5.8Tel Audio I/O

Pin	Connector	Pin Name	Description	I/O
3	P2401	TEL AUDIO IN HI	Telephone Audio Input	IN
4	P2401	TEL AUDIO LO	Ground Reference for Telephone	--
5	P2401	TEL MIC AUDIO OUT HI	TEL MIC Audio Output	OUT

4.5.9Headset Outputs

Pin	Connector	Pin Name	Description	I/O
16	P2402	PILOT HEADSET AUDIO OUT LEFT	Pilot Headset Audio	OUT
31	P2402	PILOT HEADSET AUDIO OUT RIGHT		OUT
			Output
1	P2402	PILOT HEADSET AUDIO OUT LO		--
3	P2402	COPILOT HEADSET AUDIO OUT LEFT	Copilot Headset Audio	OUT
4	P2402	COPILOT HEADSET AUDIO OUT RIGHT		OUT
			Output
2	P2402	COPILOT HEADSET AUDIO OUT LO		--
40	P2401	PASS HEADSET AUDIO OUT LEFT	Passenger Headset	OUT
41	P2401	PASS HEADSET AUDIO OUT RIGHT		OUT
			Audio Output
42	P2401	PASS HEADSET AUDIO OUT LO		--

NOTE

Copilot and Passenger headset outputs are internally the same connection. Separate Passenger headset output pins are provided for wiring convenience and GMA 340 pin compatibility.

NOTE

For CREW ISO configuration, the copilot’s headphone jack should be wired in parallel with the pilot jack to the Pilot headset output pins. Passengers may be connected to either the copilot or passenger pins.

4.5.10COM Swap

Pin	Connector	Pin Name	Description	I/O
20	P2402	COM SWAP* IN	Ground Through a Momentary PB	IN
			Switch to Swap Active COM (COM 1
			or COM 2)
21	P2402	COM SWAP RETURN	Return Path for PB Switch	--

Page 4-8	GMA 240 Installation Manual
Rev. A	190-00917-01