Miscellaneous Configurable I/O - Garmin GMA 35 Installation Manual

4.9 Miscellaneous Configurable I/O

The following active-low discrete inputs and outputs are configurable.
NOTE
OEM installations with custom pin assignments may have different functionality. Refer to
OEM specific interconnect drawings.
Pin Name
PILOT PTC/ICS KEY* IN
COPILOT PTC/ICS KEY* IN
When configured as Push-To-Command (PTC), these inputs allow the pilot and copilot to enter voice
commands while pressing the appropriate PTC KEY.
When configured as ICS KEYS, these inputs allow the pilot and copilot mic audio to be heard on the
intercom system (ICS) while pressing the appropriate ICS KEY.
Pin Name
PASS ISO TOGGLE/ICS KEY* IN
When configured for PASS ISO TOGGLE, pressing this key will toggle the intercom isolation state of the
passengers.
When configured as ICS KEY, this input allows the audio from all passenger mics to be heard on the
intercom system (ICS) while pressed.
Pin Name
COM ACTIVE* OUT
An active low output that has low-impedance to ground during transmission and when received audio is
detected on the COM selected for transmission.
Pin Name
PA MUTE* OUT
An active low output that has low-impedance to ground when PA mode is selected AND when the PTT
key is pressed.
190-00858-11
Rev. H
Table 4-17. PTC/ICS
Table 4-18. ISO/ICS
Table 4-19. COM
Table 4-20. PA Mute
Connector Pin
P3501 16
P3502 30
Connector Pin
P3502 14
Connector Pin
P3501 24
Connector Pin
P3502 12
GMA 35/35c Installation Manual
I/O
In
In
I/O
In
I/O
Out
I/O
Out
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