[NYTOM]

I seem to see a lot of panels with a EIS-4000 tucked in down on the bottom or maybe on the side of a cockpit while a Dynon, Advanced Flight Systems or other manufacturers engine monitor occupies a prominent position on the right side of the main panel. Why? Is it the monitoring /alarm feature that is desired? Why would you want to spend all of that extra cash for two units?
Redundancy? I know it's desired but I would think some sort of mechanical backup would better than two electric units. What am I missing here?

 

[Ironflight]

Not all Dynon's and AFS units act as engine monitors Tom (I amnot certain bout the AFS - might be wrong...). The GRT EFIS requires the EIS 4000 to act as the engine data monitoring unit, which then outputs a serial data stream with all the info to the EFIS. So...sometimes, we need the EIS 4000 as a "data collector" for the fancier EFIS units.

Paul