Garmin GMA 240 External Configuration Pins, Pin Connector Pin Name Description

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4.4Configuration Pins

4.4.1External Configuration Pins

The following pins may be used to change the configuration of the installation as described.

Pin

Connector

Pin Name

Description

16

P2401

MASQ

Ground to disable Master Avionics Squelch circuitry. This

 

 

INHIBIT*

will cause alerts and selected radios to be heard at all times

 

 

IN

without needing to exceed the mute threshold. This causes

 

 

 

an increase in background noise from the inputs during quiet

 

 

 

output.

29

P2401

CREW

Ground to configure the unit for CREW ICS isolation. In this

 

 

ISO* IN

configuration, the copilot headset jack should be wired in

 

 

 

parallel with the pilot headset output. The mics are wired as

 

 

 

normal. In this mode, when the PILOT ISO button is

 

 

 

selected, the pilot and copilot will hear each other, but will be

 

 

 

intercom isolated from the passengers.

13

P2402

PILOT ISO

Ground to allow Music audio to be heard by the pilot during

 

 

MUSIC* IN

pilot isolate mode.

19

P2402

BUTTON

Ground to enable beep tone annunciation of button presses

 

 

PRESS

 

 

 

TONE

 

 

 

ENABLE*

 

 

 

IN

 

30

P2402

MUTE ON

Ground to enable muting of other selected radios during mic

 

 

COM TX*

selected COM transmission (mic-selected COM is still heard,

 

 

IN

but not other selected radios)

* Denotes Active Low (Ground to activate)

GMA 240 Installation Manual

Page 4-5

190-00917-01

Rev. A

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Contents GMA Description Record of RevisionsSection Range Information Subject to Export Control LawsThis page intentionally left blank Table of Contents Appendix a Outline and Installation Drawings List of Illustrations GMA 240 Hardware MOD Level History Equipment Description IntroductionCharacteristic Specification Technical SpecificationsFeatures Summary Physical CharacteristicsElectrical Characteristics Part Number Document Power RequirementsReference Documents Limited Warranty Blank GMA 240 Wiring, Configuration, and Adjustment Options Installation MaterialsGarmin P/N Equipment AvailableInternal Configuration Jumpers Component Name Default DescriptionMusic VOLUME/MUTE Configuration AdjustmentsHardwire Configuration Option Access Hole Location Top ViewNoise GMA 340 Unit Rack GMA 240 MountingPositioner Unpacking UnitElectrical Connections Audio Shield Termination GMA 240 InstallationLamp Test Post Installation CheckoutFailsafe Operation Check Transceiver Operational CheckMusic System Check Aircraft Receivers CheckPin List Connector Description1 P2401 Connector J2401 Pin Assignments Pin Name 2 J2402 Connector J2402 Pin Assignments Pin Name 3 P2403 Connector front panel 2.5 mm mini-jack Aircraft Power and LightingAircraft Power Pin Connector Pin NamePin Connector Pin Name Description Configuration PinsExternal Configuration Pins Audio Inputs/Outputs and Mic Keys Intercom Key Inputs if configuredCOM Audio and Mic Keys Pin Connector Pin Name Description AUX and NAV Audio Inputs Pin Connector Pin Name Description Alert Audio I/O Pin Connector Pin Name DescriptionFailsafe Warning Audio Pin Pin Name DescriptionCOM Swap Pin Connector Pin Name Description Tel Audio I/O Pin Connector Pin Name DescriptionHeadset Outputs Pin Connector Pin Name Description Appendix a Outline and Installation Drawings Figure A-2. GMA 240 Connector/Rack Assembly Drawing Figure A-3. GMA 240 Recommended Panel Cutout Dimensions Appendix B Interconnect Drawings Figure B-1. GMA 240 Interconnect Drawing page 2 Figure B-1. GMA 240 Interconnect Drawing page 3 GMA240 J2401 Top of Main Board Bottom of Main Board

GMA 240 specifications

The Garmin GMA 240 is a state-of-the-art audio panel designed specifically for aviation applications. This device is known for its advanced features, user-friendly interface, and superior sound quality, making it a popular choice among pilots and aircraft owners. One of the standout characteristics of the GMA 240 is its ability to integrate seamlessly with a variety of communication and navigation systems, enhancing situational awareness and streamlining cockpit operations.

One of the main features of the GMA 240 is its capability to manage multiple audio inputs. The panel provides independent volume controls for the pilot and co-pilot, allowing each to adjust their audio levels according to their preferences. Additionally, the GMA 240 offers a dedicated input for auxiliary devices, such as smartphones or tablet computers, facilitating music playback or calls during flight.

The GMA 240 also incorporates advanced noise reduction technology. This feature minimizes ambient noise interference, ensuring that communication between the crew and air traffic control is crystal clear. The panel is equipped with a digital processing function that enhances audio clarity and reduces background noise, a critical asset in the typically noisy environment of an aircraft cockpit.

Another noteworthy characteristic of the GMA 240 is its intuitive operation. The layout of the controls is logical and straightforward, allowing pilots to adjust settings quickly and efficiently without distraction. This ease of use is crucial, especially during high-pressure situations when pilots need to maintain focus on flying while managing audio communications.

The GMA 240 supports a wide range of aircraft configurations, making it a versatile choice for various aviation needs. It is designed to be compatible with both general aviation and commercial aircraft, further extending its usability in different environments. The panel meets rigorous safety standards, ensuring it can withstand the demands of aviation use.

In terms of installation, the GMA 240 is engineered for easy integration into existing cockpits, requiring minimal modifications. Its compact design and robust build quality ensure durability even in challenging flight conditions.

In summary, the Garmin GMA 240 audio panel stands out for its combination of advanced features, user-friendly design, and high-quality performance. With its excellent noise reduction capabilities, independent audio controls for each crew member, and broad compatibility, it is an essential tool for enhancing communication and safety in the cockpit. This audio panel continues to be a preferred choice for aviation professionals seeking reliability and efficiency.