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ENGINE MANUAL
IAE50R – AA
E1.01.05 – E
Issue date: 25.Jan.2018
Page: 19-9
Revision no: 9
19.1.4.4
Option: Installation of ECU according D0160 section 16 CAT Z
If installation according DO160C section 16 CAT Z is required an independent power supply is
required. Suggestion for such installation is shown in the following figure:
12V Generator Bus
12V Battery Bus
12V Battery
ECU
Starter
Generator
Generator Regulator
Bus Tie Max
25Amp
+
+
-
-
+
-
IGN1A
IGN2A
INJ1
Basic Recommended Installation of ECU Supply Bus to fulfill
Do160 Sec.16 CAT Z
Fig. 16: Cat Z
To meet category Z as tested in certification progress you have to ensure that the ECU is
supplied directly from alternator and battery with two separate lines. The installation shall
ensure power supply to ECU in case of fault of alternator or battery.
The proposal of wiring principal is shown in the figure above. These protect against a short to
ground in the supply wires to the ECU, preventing high current drain from the ECU internal
bus bar from the other supply which would cause the ungrounded breaker to “pop”.
For further information contact Austro Engine GmbH.