Aircraft Automation ECOTRIM Manual do Piloto - Página 15
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ECOTRIM Trim System
Harness diagram made easy:
To easily understand the harness, we will explain all components and wire colors
together with their function:
CON20. This DB15 connector is Female on the instrument and Male in the wiring
Harness. The pin numbers are shown looking at the connector from the rear of the
instrument:
Pin 1: This is 5-volt power supplied from the instrument to the model radio control
servos. The current that can be drawn from the instrument is enough to drive both
standard supplied servos. Should you install more powerful servos or more than one
for each function (pitch or roll) then a separate power supply should be provided. This
is done by disconnecting the White/Red cable form pin 1 and reconnecting it to the
provided power supply.
The 5-volt supplied to the servos should have a safety disconnect switch so that power
can be removed from the Yellow wire in case of a servo runaway. This is only for
emergency disconnect. The Yellow wire splices to the White/Orange wire inside each
servo connector where 5-volts is supplied.
The splice is done inside the DB15
connector shell.
Pin 6: This is a Pulse Width Modulation (PWM) output provided by the instrument to
drive the pitch servo. A White/Blue wire inside a coaxial mesh is connected to this pin.
The other end of this wire ends up in the pitch servo connector.
Pin 14: This is a Pulse Width Modulation (PWM) output provided by the instrument to
drive the roll servo. A White/Blue wire inside a coaxial mesh is connected to this pin.
The other end of this wire ends up in the roll servo connector.
Pin 11: This is a Pulse Width Modulation (PWM) output provided by the instrument to
drive the yaw servo. A White/Blue wire inside a coaxial mesh is connected to this pin.
The other end of this wire ends up in the yaw servo connector.
Pin 8: This Black wire should be connected to ground. It is the zero-volt reference for
the instrument power supply, servos and serial port signals. Each servo connector has
one ground pin connected to this wire.
Pin 9: An optional momentary push button can be connected. Pulsing this push button
(hat switch) will trim roll to the right (or yaw right).
Pin 4: An optional momentary push button can be connected. Pulsing this push button
(hat switch) will trim roll to the left (or yaw left).
Pin 12: An optional momentary push button can be connected. Pulsing this push
button (hat switch) will trim pitch up.
Pin 5: An optional momentary push button can be connected. Pulsing this push button
(hat switch) will trim pitch up.
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