Electronics International MVP-50T - Manual (Page 22)

Connect the aircraft static line (airspeed) line
to the port on the PT-30Alt. Be sure this
line is tight. The port is a 1/4" flare union.
Care should be taken not to put excess
pressure on the flexible line. Make
sure the flexible line does not
kink.
G. G. G. G. G. Other Pressure Transducer Installations: Other Pressure Transducer Installations: Other Pressure Transducer Installations: Other Pressure Transducer Installations: Other Pressure Transducer Installations:
Other pressure transducers should be mounted in the aircraft in the same manner as the Gyro Vacuum
Transducer or the Oil and Fuel Pressure Transducers, as appropriate. Note: Any unused + or -
pressure inputs must be grounded to a ground pin on the EDC 37-pin connector.
2.7 Install the Interface Circuit for Annunciators:
Any Temperature or Resistive Fuel Level channel on the EDC may be used to monitor the state of a switch,
relay or output from a device. This output can be used to trigger a light (annunciator) on the MVP. An-
nunciator lights such as Chip Detect, Bypass, Deice, Pitot Heat, Fire, Fault, Exceedance, etc. can be dis-
played on the Main or System screen on the MVP.
To monitor a voltage, a VI-221 (Voltage Interface Unit) will be required. This consists of a 221K ohm
resistor heat shrunk between two wires with a D-Sub pin crimped on one end. The following methods may
be used to interface an EDC channel (using a VI-221) to a switch, relay or device:
A. A. A. A. A. Monitoring a Signal That Switches Between Any Voltage and Ground: Monitoring a Signal That Switches Between Any Voltage and Ground: Monitoring a Signal That Switches Between Any Voltage and Ground: Monitoring a Signal That Switches Between Any Voltage and Ground: Monitoring a Signal That Switches Between Any Voltage and Ground:
16
.170" ID Flexible Tube
Aircraft Static Line
To EDC
Press Input
(Top Connector)
B. B. B. B. B. Monitoring a Signal that is Switched to Ground: Monitoring a Signal that is Switched to Ground: Monitoring a Signal that is Switched to Ground: Monitoring a Signal that is Switched to Ground: Monitoring a Signal that is Switched to Ground:
EDC
Temp or Resistive Fuel
Level Channel.
Device, Switch or Relay
Bus or any Voltage
Load
VI-221
EDC
Temp or Resistive Fuel
Level Channel.
Bus
Load
VI-221
VI-221
Device, Switch or
Relay
If a Load does not exist,
an additional VI-221
must be placed in the
circuit as shown. This
provides a pullup for the
switch. Light, Horn, etc.