Electronics International CGR-30P - Manual (Page 38)

3.4 Connect the EDC Harness to the Shunt:
Route the EDC Amps wires to the Shunt. The way the Shunt is installed in the aircraft determines which lug
will be used as "+" (see “Installing the Shunt” in the previous section of this manual). The EDC +Amp Input
wire (orange) should be connected to the small lug on the "+" side of the Shunt. The EDC -Amp Input wire
(brown) should be connected to the small lug on the "-" side of the Shunt.
3.5 Connect the EDC Harness to the Fuel Flow Transducer:
Route the fuel flow cable in the EDC harness to the Fuel Flow Transducer. Cut the wires to length, install the
appropriate connectors (see the “Working with Connectors” section of this manual for more information) and
connect to the fuel flow transducer. When connecting to the Fuel Flow Transducer, leave some slack in the
cable exiting the transducer to prevent future damage to the transducer.
2 9
Rin
Gnd
EDC
Resistive Fuel Level
(4ea.)
Bottom Connector
332-Ohms
To Capacitive Signal Out
(0 to approx 150 mV)
3.6 Connect the EDC Harness to the Existing Capacitive Fuel Level System:
The output signal of a capacitive fuel level system (on a certified aircraft) will have a wire connected from the
capacitive system to the fuel level gauge. The signal on this wire will be 0 to approx 150mV DC. The other
side of the gauge will be grounded. Re-route the signal wire (currently connected to the fuel level gauge) to
one of the resistive inputs on the bottom connector of the EDC. DO NOT connect an RFLM unit into this
system, damage to the system may occur. The current fuel level gauge must be remove from the system.
A 332-ohm resistor should be connected from the signal wire to ground. For a CGR-30 STC’d system, this
resistor is integrated into the wire harness supplied with the system.
+10V, (Red, pin 15)
Gnd, (Blk, pin 16)
Signal (Wht, pin 14)
FT-60, FT-90, FT-180
Fuel Flow Transducers:
EDC
Fuel Flow Input
(1ea.)
Top Connector