Dynon Avionics EMS-D10 Installation Guide - Manual (Page 38)

Instrument Installation
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 in your
EFIS-based Installation Guide for more information.
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.
To EMS-D10 Audio
Alert Out
Outside terminal
Outside terminal
Center terminal To intercom/audio
panel auxiliary input.
To ground
To set the volume of the engine alarms, you will need your EMS-D10 powered on and the alarm
output wired as described above. Enter the EMS menu by pressing any button beneath an EMS
main page. Press MORE > SETUP > GLOBAL. Press DOWN▼ to select ALARM CONFIG
and press SEL. Scroll down to select TEST ALARM AUDIO. Press and hold SEL to generate a
tone on the audio output. Adjust the variable resistor until the volume in the intercom or audio
panel is at an acceptable level.
4-6 EMS-D10 Installation Guide