Discrete Outputs - Garmin GNS 480 Installation Manual

Installation Procedures
2.8.8 D
ISCRETE
2.8.8.1 ILS Energize
P7-33 ILS Energize
The ILS Energize output is grounded whenever a localizer frequency is tuned on the GNS 480 nav radio,
regardless of which navigation source (GPS or VOR/ILS ) is currently selected to drive the CDI.
2.8.8.2 Precision Approach
P5-68 Precision Appr
The Precision Appr output is grounded when a precision approach is active. Currently, the precision
approach output will be active when the GNS 480 nav radio is tuned to a localizer and the VOR/ILS
radio navigation data is selected for display on the CDI. This output may be connected to the ILS
Energize input of an autopilot or flight director to provide higher autopilot gain when the GNS 480 is
operating in precision approach mode.
2.8.8.3 Audio Message Active Out
P5-70 Audio Msg Active Out
The Audio Msg Active Out is grounded whenever the GNS 480 is playing an audio message or audio
tone. This output is grounded 200 msec prior to playing the message / tone, and remains grounded for
200 msec following completion of the message / tone.
2.8.8.4 Power Control Out
P7-36 Power Control Out
The Power Control Out is grounded whenever power is applied to the GNS 480, and open otherwise.
2.8.8.5 Discrete In / Out
P5-72 Discrete In/Out 1
P5-73 Discrete In/Out 2
P5-74 Discrete In/Out 3
P5-75 Discrete In/Out 4
The four Discrete In/Out's are software-configurable as inputs or outputs. These are general purpose
inputs/outputs whose function depends upon what interfaces are configured on the GNS 480.
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UTPUTS
560-0982-01 Rev A GNS 480 (CNX80) Installation Manual