Garmin G3X - F.5.3.2 Transducer Output Power; F.5.3.3 Magnetometer Power

190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page F-10
F.5.3.2 Transducer Output Power
The GSU 73 supplies output power for engine/airframe sensors that may require supply voltage excitation.
The GSU 73 outputs voltage levels of +5, +10, and +12 Vdc, these outputs may be spliced to allow
connection to multiple sensors if needed. Max current specs are listed in the following table.
Transducers that require more current (such as Princeton capacitive fuel quantity converters) must be
supplied from aircraft power instead of GSU 73 transducer power output pins.
F.5.3.3 Magnetometer Power
The GSU 73 outputs supply voltage to the GMU 22 using pins 38 & 39.
Power Supply Output Maximum Continuous Output Current
+5VDC Transducer Power Out 125 mA
+10VDC Transducer Power Out 100 mA
+12VDC Transducer Power Out 150 mA
Pin Connector Pin Name I/O
55 J732 +12VDC TRANSDUCER POWER OUT OUT
56 J732 TRANSDUCER POWER OUT LO (GROUND) --
58 J732 +10VDC TRANSDUCER POWER OUT OUT
57 J732 TRANSDUCER POWER OUT LO (GROUND) --
75 J732 +5VDC TRANSDUCER POWER OUT OUT
74 J732 TRANSDUCER POWER OUT LO (GROUND) --
Pin Connector Pin Name I/O
38 J731 MAGNETOMETER POWER OUT OUT
39 J731 MAGNETOMETER GROUND --