Dynon SkyView HDX - Landing Gear Position Indication

SV-EMS-220 Engine Monitoring System Installation and Configuration
10-20 SkyView HDX System Installation Manual - Revision E
input pin, and the other wire to any available EMS Ground, any of Pins 3, 5, 13, 16, 17,
or 30.
10.2.20 Landing Gear Position Indication
See Section 10.3 Contacts.
10.3 Contacts
Contacts may be connected to any general purpose input pin on the SV-EMS-220’s D37.
The number of contacts in your SkyView system is only limited to the number of unused
general purpose input pins on the connector.
Dynon Avionics does not sell contacts or switches.
Contacts are used for a variety of purposes, such as monitoring canopy closure. The EMS
Software reads the voltage state of general purpose inputs. To configure them as
contacts, use two (2) voltage ranges in your sensor setup. Set one (1) to 0-2V, and the
other from 2-5V. SkyView will then report whether each input is open (no connection to
ground, which is the 2-5V state) or closed (connection to ground, which is the 0-2V state).
You must ensure that when closed, the contact connects to a ground common to the SV-
EMS-220. Generally, the voltage on the general purpose inputs should not exceed 15
volts, but the inputs are protected against spikes up to 30V. Generally, it is safe to connect
a general purpose input up to any 12V electrical signal (such as monitoring whether power
is connected to a 12V fuel pump), but the same is not true for a 24V aircraft – connecting
24V (continuous) to a general purpose input will damage the input.
General purpose input pins are 0 to 5 volt inputs. While higher voltages are
tolerated, the voltage will not read higher than 5 volts. Therefore, only use
voltages between 0 and 5 volts in your sensor setup.
Contacts Used for Retractable / Amphibious Landing Gear and Related Alerts
The simplest method to monitor landing gear state is to use a contact as there are only
two (2) states to monitor and it is mechanically and electrically easiest to install. To enable
audio alerts related to landing gear status, the contact used for monitoring the status of
landing gear must be named GEAR 1, GEAR 2, GEAR 3, or GEAR 4:
SETUP MENU > EMS SETUP > SENSOR INPUT MAPPING > C37 Pxx >
> FUNCTION: CONTACT
> SENSOR: CONTACT
> NAME: GEAR 1
To configure the GEAR contact alert for retractable landing gear:
• Install the GEAR contact that when the landing gear is up, the state of the
contact is “UP” and when the landing gear is down, the state of the contact is
“DOWN”.
• SETUP MENU > AIRCRAFT INFORMATION:
> LANDING GEAR TYPE: RETRACT