Dynon Avionics Heated AOA/Pitot Probe - Manual (Page 20)

Heater Controller Mounting and Wiring
3-6 AOA/Pitot Probe and Heated AOA/Pitot Probe Installation Guide Rev. C
whenever the Probe’s heater is turned Off or is not functioning properly. While
this is not required for Experimental and LSA category aircraft, this feature
provides feedback that your Heated AOA/Pitot Probe is working as designed. The
Heated AOA/Pitot Probe functions properly whether or not you make this
connection - it is merely a status output for your convenience.
The PITOT HEAT STATUS line (White wire) is grounded when the controller is turned off or not
functioning properly. The PITOT HEAT STATUS line (White wire) can be connected to an
indicator on the panel, whose other terminal is connected to Switched 12V
2
. When the Heated
AOA/Pitot Probe is switched on and functioning properly, the PITOT HEAT STATUS line will be
open (not grounded), leaving the indicator light turned off (no current is flowing). The PITOT
HEAT STATUS line (White wire) can handle a maximum of 1A current, so choose the type of
indicator carefully.
Aircraft Spruce P/N 17-410 is an example of an Indicator light that will work for this application.
An LED and resistor in series will also suffice. If you use an LED as the indicator, you must
choose a resistor that delivers the appropriate current to the LED, and can accommodate the
power required for its current and voltage drop.
If you own a Dynon Avionics Engine Monitoring System (EMS-D10, EMS-D120, FlightDEK-D180),
you can use one of the two Contact Inputs to display the state of the controller Status line
(White wire). If you own a SkyView system with a SV-EMS-220 module, you may use one of its
General Purpose Inputs, configured as a Contact Input, to display the state of the controller
Status line (White wire). Connect the White wire to the desired EMS or SV-EMS-220 input pin
with no additional resistors or indicators. You will need to configure the contact display as
described in your EMS product’s Installation manual / SkyView System Installation Guide.
2 If connected to always-on 12V, the PITOT HEAT STATUS indicator will always be on when the Heated AOA/Pitot
Probe is switched Off)