Grounding Cables (Ems Ground Point/Engine/Ground Point) - Rotax 912 i Series Installation Manual

2) Grounding cables (EMS ground point/aircraft ground point)
During installation, a distinction is made between 2 circuits
Introduction
- Aircraft circuit
- Electronic engine management circuit (EMS circuit).
When the engine is running (dynamic condition), the two circuits are con-
nected to each other through the FUSE BOX.
The routing of the grounding cables (EMS ground and aircraft ground) is
an important point to be considered when installing the engine electronics.
Components that must not be connected to the aircraft ground or that can
be installed isolated on the firewall:
- ECU
- Regulator A of FUSE BOX
- Starter relay
For checking purposes, use a multimeter to carry out a continuity test
Checks
between rectifier regulator A and rectifier regulator B in the static condi-
tion.
NOTE:
FUSE BOX
Graphic
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
INSTALLATION MANUAL
In the static condition (LANE select SW: "OFF" engine
NOTICE
WARNUNG
not running), the EMS ground and the aircraft ground
must not be connected. Components that are connect-
ed to the EMS ground must be installed in such a way
that they are isolated from the aircraft ground.
A continuity must not be present. See
1
2
Fig. 1.
3
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January 01/2012