Equipment Connections; Outside Air Temp Input; Audio Output - uAvionix AV-20 Installation Manual

2.1 Equipment Connections

All connections are provided on the single 9-Pin D-sub connector and the two
pneumatic fittings.
The unit connects to aircraft power via a normal power circuit with a dedicated 1 Amp
breaker.

2.2 Outside Air Temp Input

The outside air temperature interface requires an external analog probe. This port
connection is compatible with the Davtron probe analog probe P/N C307PS (not
supplied). This is a simple two-wire current source based on the Analog Devices
AD590KH component.
The sensor reading may be trimmed in the setup pages.
Do not tap into an existing OAT system that is in use (the probes may not
be put in parallel or series).
OAT functionality requires separate approval for installation of the OAT
probe.

2.3 Audio Output

The audio panel connection is a low-voltage analog output that is designed to
connect directly to an audio panel (typically a non-switched input). High power
outputs capable of directly driving a cockpit speaker are not provided.
UAV-1003613-001
Rev D
The model and part number are shown on the splash screen on
power-up, and on the system setup info page.
Note that the base AV-20 incorporates both pitot and static ports
on the rear of unit but are not utilized. This is provided for
upgrade purposes and are plugged from the factory. Do not
remove the plugs.
Do not connect Pitot and Static in the AV-20 Base model units.
Pitot and Static connections ARE required in the AV-20-S Model
for proper functionality.
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