Effectivity: 914 Series
Edition 2 / Rev. 0
d04282
page 121
July 01/2008
BRP-Rotax
INSTALLATION MANUAL
19.4.9) Isolating switch for servo motor
See Fig. 69.
The isolating switch serves to break the circuit of the servo motor for a short
time in case of surging of the TCU.
After a short hunting stable operation should follow.
- design: 2 pole on-off switch (Fig. 69 Pos. (32))
■ CAUTION: The isolating switch has to be designed such that it is guarded
against being turned "off" by mistake or unintentionally. The
fixed and secured position is "ON".
- switching voltage: min. 100 V
- switching current: min. 2 A
- place of installation:
On the instrument panel in the pilot's field of view, anytime and easy to
reach.
Installation instruction:
The isolating switch has to be installed directly into the lines from 36 pole plug
receptacle to servo motor.
■ CAUTION: The servo motor is connected to DC supply. The polarity (wire
2 and 14) of the cables must not be changed, otherwise the
sense of rotation would be reversed and control would be
rendered ineffective.
To avoid any mix-up of the polarity cut first one wire and connect on switch as
per wiring diagram (Fig. 69).
After first wire is connected sever second wire and connect also to switch.
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