Page 40
VP-X Installation and Operating Manual
Rev. D (August 5, 2020)
5.20 Flap System Wiring
The VP-X controls the flaps and provides circuitry for the flap position sensor.
The flaps can be configured to run either:
1.
Momentary – flaps only run when the flap switch is pressed. A
position sensor is optional.
2.
Position – flaps run down to the next position when the flap switch
is pressed. Flaps run all the way up when the flap switch is pressed.
A flap position sensor (Ray Allen POS-12) is required for this option.
You can set 4 positions – a top, two middle (optional), and a bottom.
When you press the flap up switch, the flaps go all the way up unless
you press the flap down switch to stop them mid-stream. On some
aircraft, you can set the reflex position to the top position, the 0 deg
position to the first stop, approach flaps to the second stop, and
landing flaps to the bottom stop.
If you are setting the flap circuit breaker value to greater than
5 amps, you must have a VP-X with serial number 1350
or higher – Contact Vertical Power Support if you need an
upgrade.
As of firmware version 1.5 the VP-X also supports RV-10 reflex settings. In
order to use the reflex settings you must have the flaps in Position mode as
described above. No special wiring is required to use the reflex features. See
“10.5 Trim and flap operation” on page 68 for details on reflex operation.
Flap Position Sensor (optional)
Function
VP-X Pin
I/O
Position feedback (wht/grn)
J1-17
I
Ground (wht/org)
J1-18
--
+2.5 reference voltage (wht/blu)
J1-19
O
Flap Motor and Switch Inputs
Function
VP-X Pin
I/O
Flap motor
J12-5 (connect either way)
O
Flap motor
J12-6 (connect either way)
O
Flap Up switch input
J2-14
I
Flap Down switch input
J2-15
I
You can wire a flap switch for the pilot and, optionally, one for the co-pilot.
The flap switch must be an SPDT momentary action switch (ON)-OFF-
(ON), with a middle OFF position. Many flap switches also come as DPDT
switches. If you have a DPDT switch, you can wire it as shown in the diagram
below:
To Flap Up
switch input
J2-14
(on)-off-(on)
DPDT Flap Switch
To Flap Down
switch input
J2-15
To Gnd
Only three terminals on one side of the switch need to be used.
(Switch viewed from back)
Do not install a flap switch that stays in the UP position.
The flap switch has three pins: a common, one to command flaps up and one
to command flaps down.
Ground
Flap Motor
VP-X
Flap Switch
(on) - off - (on)
Both flap motor pins on the VP-X (J12, pins 5 & 6) are wired directly to the
flap motor. The polarity of the wires does not matter, as it can be reversed in
the setup menus.
RV flap system: Do not install the Van’s Flap Positioning System (FPS).
If you want intermediate stops or flap position feedback on the EFIS, install a
Ray Allen POS-12 position sensor.
Flap Position Sensor
You can purchase a clevis/pushrod kit from your local hobby shop, as the
Ray Allen kit is not for use with the POS-12.
