Electronics International MVP-50T - Manual (Page 33)

3.8 Connect the EDC Harness to the P-300M Magnetic Fuel Level Senders:
Route the appropriate fuel level wires (for the number of tanks to be monitored) in the EDC harnesses to the
P-300M magnetic fuel level senders. Cut the wires to length, install the appropriate connzectors (see the
“Working with Connectors” section of this manual for more information) and connect to the P-300M fuel level
sender.
28
Tach Gen Tach Gen Tach Gen Tach Gen Tach Gen
Fuel Tank
1
+5V (Red)
Gnd (Black)
Rin (White) EDC
Resistive Input
(1 of 4)
Bottom Connector P-300M
Fuel Level Sensor
.
.
Fuel Tank 4
3.9 Connect the EDC Harness (Volts Measurment Pin) to the Bus:
Pin 35 of the EDC top connector monitors bus voltage. Connect this pin to the bus to be monitored.
3.10 Connect the EDC Harness to the N1 and/or N2 Tach Generator:
Most N1 and N2 Tach Generators provide an output signal on two or three pins. Most often the output signal
is referenced to ground. To connect the EDC harness to the N1 and/or N2 Tach Generator perform the follow-
ing:
1). 1). 1). 1). 1). Determine if the Tach Generator output signal is ground referenced:
Ohm the output pins to ground. If the Ohm reading is less than 200
ohms, the output signal is ground referenced.
2). 2). 2). 2). 2). Connecting the EDC harness to a ground referenced Tach Generator:
Connect the wire from the appropriate EDC harness to one of the
output pins on the N1 and/or N2 Tach Generator. Your Done.
3). 3). 3). 3). 3). Connecting the EDC harness to an ungrounded Tach Generator: Ground one of the output pins of
the Tach Generator and connect any one of the other pins to the appropriate wire in EDC wire har-
ness. Your Done.
Note: Note: Note: Note: Note: The Walters Tach Generators have four output pins. Connect the “A” pin to ground and
connect the “B” pin to the appropriate wire in EDC wire harness.
3.11 Connect the EDC Harness to the VI-221's (Voltage Interface Units):
Route the appropriate EDC wire to the VI-221’s that were used to interface the Gear Position Lights, Unsafe
Light, Flap Position, Trim Position and/or any indicator to the EDC.
EDC
Temp or Resistive Fuel
Level Channel.
VI-221