SV-EMS-220/221 Installation and Configuration
7-66 SkyView System Installation Guide - Revision AA
Note: If you are converting a Dynon Avionics D10/D100 product installation to a SkyView
installation, you should remove any resistor that is connected to the Rotax CHTs. They are not
needed when used with SkyView.
Trim and Flaps Position Potentiometers
Position potentiometers may be connected to any general purpose input pin on the SV-EMS-
220/221’s D37 and must be calibrated according to the instructions found in the EMS Sensor
Calibration Section. The number of position potentiometers in any installation is limited by the
number of unused general purpose input pins on the SV-EMS-220/221’s D37 connector. The
tables in the Example Engine Sensor and Transducer Installations Section contain
recommended input pins for position potentiometers.
Dynon Avionics does not sell trim or flaps position sensors. These are normally included with, or
added onto, their respective servos.
Most flap and trim sensors are potentiometers (variable resistors) which require power and
ground inputs, and supply an output that is a function of position. These potentiometers come
in a variety of resistance ranges, but are typically 1 kΩ, 5 kΩ, 10 kΩ, and 20 kΩ. All of these
values will work properly with the SV-EMS-22, as there is a calibration required. Connect Pin 18
(+5 Volts Auxiliary) from the SV-EMS-220/221 to the +5 Volts input on your trim/flap position
sensor. Connect the ground input on the sensor to a ground common to the SV-EMS-220/221’s
signal ground. Connect the output of the sensor to the desired general purpose input. For
physical installation, refer to the instructions that came with your position sensor.
If you are using the output from a Ray Allen servo or sensor, connect per the chart below.
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