Skyview Power Requirements

[jvolkober]

The documentation states 3.5 amps for a Skyview installation. Is that for the screen, (10") EMS, transponder and GPS combined. I am planning on installing two screens with EMS, transponder and GPS. What is the power draw I sould plan on.

John

 

[ivanjr]

The latest installation manual calls for a 5 amp fuse or circuit breaker per display.
That runs the display, EMS, GPS and ADAHARs unit.
The xponder has it's own fuse or circuit breaker. I don't have the amp size handy at the moment.

Ivan

 

[jvolkober]

I actually want the amps to plan my endurance bus load, which I wanted to keep below 8 amps. It looks like if I put both screens on the endurance bus 3.5 amps per screen?), I will have pretty well used up my planned capacity without consideration of the essential items. This may or may not include the transponder load and EMS load, hence my inquiry.

John

 

[dynonsupport]

A 10" Screen draws 2.5A at 12V. Each module adds about 100mA at 12V, so an EMS, GPS, and ADAHRS would be 2.8A.

This DOES NOT include battery charging current, which is why we want a 5A fuse. When charging, we can draw 4A, but this is a short term draw. We will not charge the battery unless your alternator is on-line.

If you run two screens, you draw 5.3A, not 5.6A, since each module doesn't add to both screens.

The transponder is it's own load. The specs for the transponder are .3A @ 12V and .4A @12V depending on which power transponder you buy.

 

[jvolkober]

Thank you. That is exactly what I was looking for.

John

 

[paul330]

Since I have 2xADAHARS, GPS, EMS and ARINC Converter plus standby battery, I make my max current draw 4.5A. I find that uncomfortably close to justify a 5A breaker. However, the power wires look a little skinny to support a 10A breaker - they look like 22g. I assume you have 2 for redundancy but in the event of a single breakage, will the other have the current rating to be able to use a 10A breaker? Also, is there any warning of a single power wire disconnect?

 

[dynonsupport]

So take a look at AC 43.13-1B if you want to understand the basis for the following statements.

SkyView truly doesn't need the second wire until you get over 5 actual amps of current draw into a screen. Today, this isn't possible.

If you read through 43.13-1B, it turns out that individual wires in bundles that aren't heavily loaded are OK with more current going through them. SkyView's wiring bundle isn't highly loaded, and so you can put more current through it. Without digging into the deep details, feel free to use a 7.5A breaker instead of a 5A breaker.

SkyView can not detect whether one of those power wires isn't making it. This is typical of other avionics, (a certified Garmin 430 has a similar power setup, for what it's worth).

 

[klindell]

Hello Dynon,

About this same power subject; how well power input is protected in SV components, can SV be powered during engine start/alternator magnetization?
I believe yes, but there were some comments of overvoltage damages and I am a bit unsure of "official" point of view.

 

[dynonsupport]

We absolutely designed SkyView to be on during all aircraft operations including engine start and shutdown. There is no issue in doing this. SkyView's power inputs are designed to the TSO requirements for a 28V aircraft which requires 60V operation at times.

 

[legacy]

In a dual screen setup where does the EMS get its power from.  Our installation is a dual bus installation.  In the event the No.1 screen (powered by bus #1) looses all power and assuming the No.1 screen is the primary, where does the EMS get power if Screen 1's bus is dead and Screen 2 (powered from bus #2) is working fine?

 

[dynonsupport]

SkyView network is designed to provide power to the SV-EMS-220 module and all its sensors when any single display in a multiple display system is working.