Dynon Avionics Heated AOA/Pitot Probe - Manual (Page 19)

Heater Controller Mounting and Wiring
AOA/Pitot Probe and Heated AOA/Pitot Probe Installation Guide Rev. C 3-5
PROBE TO CONTROLLER WIRING
As mentioned above, it is preferable that the Heated AOA/Pitot Probe controller be mounted
close enough to the probe that 5 wires between the controller and probe can be connected
without adding extension wiring. The three mating
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pairs of colored wires – terminated with
Faston connectors – are used to carry the current to the heating element in the probe. The 2
white wires are for temperature measurement, and can thus be small. If you have mounted the
heater controller near the probe and do not need to extend the wires between the two, simply
plug each wire on the controller into its corresponding like-colored wire from the probe.
If you do need to extend the wires between the probe and the controller, use the
recommended wire size (see chart on page 3-2) to choose the correct size of wire. When
extending the wires between probe and controller, we recommend the use of a secure, solid
electrical connection such as a crimped butt splice connector. The white wires are not polarity-
dependent and do not carry any significant current, thus you can use wire as small as 26 AWG,
or larger, for any run length.
CONTROLLER POWER AND PITOT HEAT STATUS INDICATOR WIRING
PITOT HEAT STATUS
The Dynon Avionics Heated AOA/Pitot Probe controller is designed to meet the
indication requirements of FAR 23.1326 by providing an PITOT HEAT STATUS
output that can illuminate a PITOT HEAT STATUS warning indicator in the cockpit
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In newer Heated AOA/Pitot Probes shipped after October 2014, the Blue and Orange wires are now White with a
short length of Blue and Orange heat shrink tubing.
Color Function Notes
Red
12-15V
Power
(+)
Connected through a pilot-accessible PITOT HEAT switch to 10–15V
supply (via 10A circuit breaker or fuse).
Wire must be sized to conduct 10A with minimal voltage drop – See
Page 3-3.
Black
Ground
(-)
Constant connection to ground (not routed through a switch or fuse /
circuit breaker).
Must be sized to conduct 10A with minimal voltage drop.
Ground connection must be constant FOR PITOT HEAT STATUS LINE
(White wire) to operate when the controller is powered Off or not
functioning.
White
PITOT
HEAT
STATUS
Connected to a PITOT HEAT STATUS indicator light or indicator on a
Dynon Avionics EMS.
This line is grounded when the controller is powered Off or not
functioning. This circuit can handle a maximum of 1A.