Tips: Wiring Powerside (Optional) - Rotax 912 i Series Installation Manual

5.3)

TIPS: Wiring Powerside (optional)

Tip
Tip
Tip
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Performance of the key switch and operation of the relays.
Position of the key
Pins
Aircraft/Engine Status Off
Master Relay
Effectivity: 912 i Series
Edition 1/Rev. 2
BRP-Powertrain
INSTALLATION MANUAL
This design allows a simplification of the starting pro-
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cess. Instead of using the "Start Power Switch" and
the "start button" at the same time the engine can be
started by turning a key switch. In addition, the key
switch takes over the control of a master relay.
NOTE:
The pilot display takes over the control of the start
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power relay. If the display is turned ON, for example
in case of a complete restart of the aircraft, the start
power relay closes. If the key switch is actuated (en-
gine start) and put into the third position, the engine
starts. Due to the spring return position of the key
switch, it falls back to the second switching position
(ON). As soon as the engine has reached a defined
and displayed speed (1500 r.p.m.) to the pilot display,
the relay opens. The start power relay still stays open
for security reasons until restart of the display.
LANE Select Switch A and LANE Select Switch B also
NOTICE
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Fuel Pump Switch A and Fuel Pump Switch B in this
connection type must be a toggle switch.
0
switch
Open
It is not allowed to install the „Start Power
Switch" and the „Start button" with a single
switch. This may only be switched in parallel
and at the same time.
1
Master relay HIC B Pin 4
Airframe Ground HIC B Pin 12
On Engine Start
Closed Closed
2
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Page 26
January 01/2014