Dynon Avionics D100 Series to SkyView Conversion Guide - Manual (Page 9)

D10 and D100 Series Conversion To SkyView Guide – Rev D Page 9
Redundancy / failover is integral to SkyView
A SkyView system is more network-centric and redundant than an EFIS and EMS. Many of the
specific recommendations for installing a SkyView system focus on maintaining redundancy.
SkyView is designed to minimize single point failures, provided redundant units are installed.
Examples:

If a SkyView display fails, all flight and engine data can be displayed on another SkyView
display.

If the SV-ADAHRS-200 fails, the SV-ADAHRS-201 will automatically be used for flight data.
Data from multiple ADAHRS modules are continuously cross-checked against each other.
SkyView Network includes redundant data buses and redundant power lines
5
. See the SkyView
System Installation Guide for a complete explanation of installing and equipping for redundancy
and failover.
For redundancy failover, serial devices such as transponders must be connected to all SkyView
displays. SkyView displays have special circuitry and software that allows serial devices to be
connected to more than one serial “transmitter” (not normally possible). If a SkyView display
fails, another SkyView display takes over communications with all serial devices.
Redundancy extends to having independent, individual OAT probes for both the SV-ADAHRS-
200 and SV-ADAHRS-201.
Exceptions:
1) Autopilot servos have SkyView Network redundant data bus, but not redundant power –
they receive power directly from the plane’s power bus.
2) There is no redundancy for the SV-EMS-220; if the SV-EMS-220 fails, there is no engine
monitoring capability.
GPS is integral to SkyView
In an EFIS, connection to a GPS receiver is optional. In a SkyView system, connection to a GPS
receiver is required. GPS is integral to SkyView operation, including:

Time is automatically set from GPS
6
; time cannot be set manually.

During Compass Calibration, GPS position data is used to automatically calculate magnetic
inclination and intensity. Unlike with an EFIS compass calibration, it’s no longer required to
consult a cryptic web page for localized magnetic field data.

GPS position data is required to display Map and Synthetic Vision

Primary flight display fails over to use GPS ground speed in the event of zero airspeed.
Dynon strongly recommends the installation of its SV-GPS-250 in a SkyView system because it
offers numerous advantages versus panel-mounted or portable GPS units:
5 As of firmware v6.2, monitoring and failover to the redundant power bus has not yet been implemented.
6 GPS must transmit NMEA data format, not Aviation data format