190-01639-00 GSU 75 ADAHRS Installation Manual
Rev. 6 Page 4-4
4.2 Power Functions
4.2.1 Aircraft Power
The GSU 75 has inputs for the two Aircraft Power busses of 14/28VDC. AIRCRAFT POWER 1 and
AIRCRAFT POWER 2 are “diode ORed” to provide power redundancy.
4.2.2 GSU 75 Magnetometer Power
The Mag Power out pin must be used to supply power to the GMU 44.
4.2.3 GSU 75 OAT Probe Power
Refer to Section 4.5
and Figure B-1 for OAT Power (pin 6, J751) information.
Table 4-3 GSU 75 Aircraft Power
Pin Name Pin I/O
AIRCRAFT POWER 1 14 In
AIRCRAFT POWER 2 16 In
POWER GROUND 34 --
POWER GROUND 36 --
AIRCRAFT PWR1 and AIRCRAFT PWR2 are “diode ORed” to provide power redundancy
Table 4-4 GMU 44 Input Power
Pin Name Pin I/O
+12 VDC POWER 9 In
POWER GROUND 6 --
Table 4-5 GSU 75 Magnetometer Power
Pin Name Pin I/O
MAGNETOMETER POWER OUT 13 Out
MAGNETOMETER GROUND 33 --
The document reference is online, please check the correspondence between the online documentation and the printed version.
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