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Page A-10 G3X Installation Manual – Pinouts
Revision A 190-01115-01
A.3.3 Power I/O
A.3.3.1 Aircraft Power
The GSU 73 has four inputs for aircraft power bus inputs of 14/28Vdc.
Pin Connector Pin Name I/O
47 P731 AIRCRAFT POWER 1 IN
49 P731 AIRCRAFT POWER 2 IN
59 P731 POWER GROUND --
61 P731 POWER GROUND --
A.3.3.2 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.
Pin Connector Pin Name I/O
55 P732 +12VDC TRANSDUCER POWER OUT OUT
56 P732 TRANSDUCER POWER OUT LO (GROUND) --
58 P732 +10VDC TRANSDUCER POWER OUT OUT
57 P732 TRANSDUCER POWER OUT LO (GROUND) --
75 P732 +5VDC TRANSDUCER POWER OUT OUT
74 P732 TRANSDUCER POWER OUT LO (GROUND) --
A.3.3.3 Magnetometer Power
The GSU 73 outputs supply voltage to the GMU 44 via pins 38 & 39.
Pin Connector Pin Name I/O
38 P731 MAGNETOMETER POWER OUT OUT
39 P731 MAGNETOMETER GROUND --
A.3.4 GSU System ID Program
Pins 4 & 5 must be left open (floating) for proper G3X configuration.
Pin Connector Pin Name I/O
4 P731 GSU SYSTEM ID PROGRAM* 1 IN
5 P731 GSU SYSTEM ID PROGRAM* 2 IN
* Indicates Active Low