Electronics International MVP-50P - Manual (Page 78)

A5.0 Appendix:
Setting Up the Gear Position and Unsafe Indicators
The position of the landing gear is displayed on the MVP System Screen. When the wheels are lowered, the MVP
will show the gears in the down position. During transition the word “UNSAFE” will be shown in red. If a gear is
hung, it will be shown in the up position with the word “UNSAFE.” The unsafe logic comes from the aircraft
system. The MVP simply monitors the unsafe line.
The MVP Gear Position Indicator is not a replacement for the Gear Lights located on the aircraft instrument panel.
The MVP Gear Position Indicator should be used as a backup. It provides the pilot a single location to view the
aircraft’s configuration and is required if the Gear Warning feature is to be enabled.
1.0 Wiring the EDC to the Unsafe Light:
Connect an unused Temperature (or Resistive Fuel Level) Channel on the EDC to the Unsafe Light via a VI-221
(221K resistor). The MVP Installation Instructions provide further details on interfacing the EDC to the unsafe light.
Note: Do not use a Resistive Fuel Level Channel that has a probe on a corresponding Capacitive Fuel Level
Channel. Resistive and Capacitive Channels are shared.
2.0 Wiring the EDC to the Gear Position Lights:
EDC
Temp or Resistive Fuel
Level Channel.
VI-221
Tap into the switched side of the Light
Gear or Unsafe Light
Gear and Unsafe Interface Circuit
There are three options for interfacing the EDC to the aircraft’s gear system.
Option 1: Connect three channels on the EDC to the aircraft’s Right, Left and Nose Gear green down lights.
The state of each gear will be displayed independently on the MVP. Select Gear Left, RT and Nose for the
probes in Configuration Screen #1. This option requires three EDC inputs. The EDC interface circuit is
shown above.
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