As Advanced Flight Systems is part of Dynon, it stands to reason that Advanced would use the Dynon EMS (Engine Monitoring System) unit. Dynon has 2 flavors - the EMS 220, which is the standard unit - and the EMS 221, which has CAN-bus connectivity. I need the 221.
The EMS-221 has 3 connectors:
- DB9 for the Skyview Network connection
- DB37 for all of the engine wiring (except CHT and EGT)
- DB25 for CHT and EGT probes
1 and 3 are straightforward. 2 is interesting.
The UL ECU passes most of the engine data over the CAN-bus connection. From the UL manual...
Bottom line: There is very little for the EMS-221 to do, other than getting the CAN-bus data from the ECU. Here is the pinout (only yellow items are planned to be used)
Basically current, voltage, fuel tanks, and CAN-bus. I have a question into Advanced on whether or not I can use the 2 voltage pins, as these are on the ACM as well - so these might not be needed).
Everything is wired, except for the tank sensors. Kinda need the wings for those...
I put the EMS on the bottom of the right hand avionics tray, thinking this would be easy to get to. Yeah, right. Its not impossible, but definitely not easy. Removing the ECU makes it easier.
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