Installation guide

SV-EMS-220/221 Installation and Configuration
7-54 SkyView System Installation Guide - Revision R
Note: If you are converting a Dynon 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 SkyView, as there is a calibration required. Connect the +5
volt Auxiliary pin from the SV-EMS-220/221’s D37 to the +5 volt input on your trim/flap position
sensor. Note that you may need access to the SV-EMS-220/221’s +5 volt auxiliary supply for
other sensor installations, so make allowances for breaking out the connection to other areas.
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. Note
that you may need access to the SV-EMS-220/221’s +5 volt auxiliary supply for other sensor
installations, so make allowances for breaking out the connection to other areas.
Function
Ray Allen Trim
Motor Wire
Color
Dynon SV-EMS-
220/221 pin
Dynon Harness Wire
Color
Ground
White / Blue
Any of 3, 5, 13, 16, 17,
30
Black
Power
White /
Orange
18 (+5V)
White/Red
Signal
White / Green
Any of 4, 6, 7, 8, 9, 10,
11, 12, 20, 21, 22, 23,
31
Varies
Figure 45 – Ray Allen Servo (Position Potentiometer)