Dynon Avionics EFIS-D100 Installation Guide - Manual (Page 22)

Instrument Installation
Audio Alert Output
The EFIS-D100 has an audio alert output for
sounding AOA and altitude alarms through
an intercom or audio panel.
If you have purchased and installed an HS34 and/or an AP74, we recommend that you
only connect the HS34 audio output or AP74 audio output (but not both) to your audio
panel. The HS34 or AP74 audio output provides voice and tone outputs for both EMS-
and EFIS-related alerts. When the HS34 or AP74 audio output is connected, it is not
necessary to connect the audio outputs of other Dynon Avionics devices. Connecting the
HS34 audio output and the AP74 audio output in parallel will result in distorted audio.
Refer to the HS34 Wiring section on page 7-10 for more information.
Connect the alarm output from the EFIS-D100 to the outside terminal of a 10 kΩ variable
resistor (not included). Ensure that audio outputs are connected similar to the following diagram.
The 10 kΩ variable resistor can be obtained from Radio Shack (P/N 271-1715) or other
electronics suppliers.
DB25
pin#
Color Function
18 Green EFIS Audio Alert Output
To EFIS-D100 Audio
Alert Out
To intercom/audio
panel auxiliary input.
To ground
Outside terminal
Center terminal
Outside terminal
To set the volume of the AOA alarm, you will need your EFIS-D100 powered on and the alarm
output wired as described above. Enter the EFIS menu by pressing any button (except the
leftmost or rightmost) beneath an EFIS page. Press MORE > SETUP > MORE > MORE >
MORE > AOAALM. In that menu, press the TEST button. While the button is held down, the
AOA alarm will sound. Adjust the variable resistor until the volume in the intercom or audio
panel is at an acceptable level.
3-10 EFIS-D100 Installation Guide