Appendix G Sensor Wiring Examples - Garmin G3X Installation Manual

NOTES
1. UNLESS OTHERWISE NOTED, ALL STRANDED WIRE MUST CONFORM TO MIL-W-22759/16 OR EQUIVALENT
2. UNLESS OTHERWISE NOTED, ALL SHIELDED WIRE MUST CONFORM TO MIL-C-27500 OR EQUIVALENT
3. UNLESS OTHERWISE NOTED, ALL WIRES ARE 24 GAUGE MINIMUM.
4. SYMBOL DESIGNATIONS
TWISTED SHIELDED SINGLE CONDUCTOR
SHIELD TERMINATED TO GROUND
TWISTED SHIELDED SINGLE CONDUCTOR
SHIELD FLOATS
TWISTED SHIELDED PAIR
SHIELD TERMINATED TO GROUND
TWISTED SHIELDED PAIR
SHIELD FLOATS
TWISTED SHIELDED 3 CONDUCTOR
SHIELD TERMINATED TO GROUND
TWISTED SHIELDED 3 CONDUCTOR
SHIELD FLOATS
5. UNLESS OTHERWISE NOTED, ALL SHIELD GROUNDS MUST BE MADE TO THE RESPECTIVE UNIT BACKSHELLS.
ALL OTHER GROUNDS SHOULD BE TERMINATED TO AIRCRAFT GROUND AS CLOSE TO THE RESPECTIVE UNIT AS POSSIBLE.
6. UP TO 4 FUEL QUANTITY GAUGES CAN BE CONFIGURED. THE FUEL QUANTITY 1/2 AND MAIN FUEL 1/2 CONFIGURATION OPTIONS
ARE MUTUALLY EXCLUSIVE AND EACH LABEL CAN ONLY BE USED FOR ONE CHANNEL. SEE THE G3X INSTALLATION MANUAL FOR
ADDITIONAL GUIDANCE ON FUEL QUANTITY GAUGE CONFIGURATION.
7. EI P-300C CAPACITANCE TO FREQUENCY CONVERTERS MUST BE USED FOR MEASUREMENT OF CAPACITIVE FUEL QUANTITY.
8. THE FUEL 1 AND 2 CHANNELS ARE RESERVED FOR RESISTIVE TYPE FUEL QUANTITY INPUTS. IF USED THE ASSOCIATED
FUEL PULL UP MUST BE WIRED TO THE +10V TRANSDUCER POWER OUTPUT AS SHOWN FOR PROPER OPERATION.
9. THE CHANNELS USING FUEL 3 AND FUEL 4 AS PART OF THEIR INPUT NAME CAN BE CONFIGURED TO MEASURE
A RESISTIVE TYPE FUEL QUANTITY SENSOR. RESISTORS MUST BE RATED TO A MINIMUM OF 1/4 WATT.
10. THE CAP 2 / FUEL FLOW 2 CHANNEL CAN OPTIONALLY BE CONFIGURED TO MEASURE EI P-300C FUEL QUANTITY, OR CONFIGURED
TO MEASURE RETURN LINE FUEL FLOW. IF A FUEL FLOW TRANSDUCER IS WIRED TO THIS INPUT THE MEASURED FUEL FLOW
WILL BE SUBTRACTED FROM THE MEASURED FUEL FLOW 1 INPUT AS PART OF A DIFFERENTIAL FUEL FLOW CALCULATION.
11. THE CHANNELS USING GP (GENERAL PURPOSE) AS PART OF THEIR INPUT NAME CAN BE CONFIGURED TO MEASURE AMPS THROUGH
A HALL EFFECT TRANSDUCER. THE CHANNEL WILL BE CONFIGURED TO EXPECT A 15.9 MV / AMP SIGNAL. SEE THE G3X INSTALLATION
MANUAL FOR ADDITIONAL GUIDANCE ON CONFIGURATION AND CALIBRATION OF A HALL EFFECT TRANSDUCER.
12. IF MEASURING BATTERY CURRENT, PLACE THE SHUNT BETWEEN THE BATTERY POSITIVE TERMINAL AND THE BATTERY CONTACTOR.
IF MEASURING ALTERNATOR CURRENT, PLACE THE SHUNT BETWEEN THE ALTERNATOR B LEAD AND THE POWER DISTRIBUTION BUS.
13. WHEN USING A DISCRETE INPUT FOR ITEMS FOR DETECTING ITEMS SUCH AS CANOPY CLOSURE, IT IS RECOMMENDED TO USE THE
GROUNDED STATE AS THE NORMAL SWITCH POSITION (E.G. CANOPY CLOSED) TO AVOID THE POSSIBILIY OF A LATENT FAILURE SUCH
AS A BROKEN WIRE OR MICROSWITCH. SEE THE G3X INSTALLATION MANUAL FOR ADDITIONAL DETAILS ON CONFIGURATION OF
DISCRETE INPUTS.
14. FLAPS/TRIM INPUTS CAN BE WIRED TO ANY AVAILABLE INPUT WITH "POS" IN THE NAME. UP TO 4 POSITION INDICATORS CAN
BE DISPLAYED.
15. THE USE OF "XX" AS A GROUND CONNECTION PIN NUMBER ON THIS DRAWING INDICATES THE SENSOR GROUND CAN BE TIED TO ANY
SIGNAL GROUND OR TRANSDUCER LOW GROUND PIN ON THE GSU 73 J732 CONNECTOR. MULTIPLE SENSOR GROUNDS MAY NEED
TO BE TIED TO A SINGLE GSU 73 GROUND PIN.
16. FOLLOW THIS WIRING GUIDANCE IF USING UMA PRESSURE TRANSDUCERS INSTEAD OF THE TRANSDUCERS PROVIDED IN THE GARMIN SENSOR KIT.
17. WHEN A DISCRETE OUTPUT IS ACTIVE, IT IS PULLED TO GROUND AND CAN SINK UP TO 20 MA OF CURRENT MAXIMUM. SEE THE
G3X INSTALLATION MANUAL FOR ADDITIONAL DETAILS ON USE OF DISCRETE OUTPUTS.
G3X Installation Manual – Sensor Wiring Examples
190-01115-01

APPENDIX G SENSOR WIRING EXAMPLES

TWISTED SHIELDED 4 CONDUCTOR
SHIELD TERMINATED TO GROUND
TWISTED SHIELDED 4 CONDUCTOR
SHIELD FLOATS
GARMIN SHIELD BLOCK GROUND
S
AIRCRAFT GROUND
WIRE SPLICE CONNECTION
COAXIAL CABLE
N/C = NO CONNECTION
Figure G-1.1 Notes
Page G-1
Revision E