Page A-10
G300 Installation Manual – Pinouts
Revision A
190-00921-01
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
The GSU 73 has two non-configurable discrete system ID inputs conforming to:
a)
Low: 0 VDC < Vin < 3.5 VDC, OR Rin < 375 ohms (active)
b)
High: 8 VDC < Vin < 36 VDC, OR Rin > 100k ohm (inactive)
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
