Raytheon 138-119, Operator'S And Service Manual

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3769DOC000002 Edition: April 06, 2005
4.3 Redundant Voltage Supply
A redundant power supply is implemented in the Compass systems (STD 22 GG--R and
STD22 GGM--R). It consists of two power supplies “cross wired”. Block diagram below
shows the principle of supplying at the example of STD22 GG--R (see also block diagram
10--BD--D--X00013--C).
Gyro 1
Operator
Unit 1
Magnetic
Sonde 1
Change
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Magnetic
Sonde 2
Operator
Unit 2
Gyro 2
Distribution Unit 1
Distribution Unit 2
Supply voltage Signals
E1 E2
E2
E2 E1 E1
Power Supply 1
Power Supply 2
1
2
2 1
Fuses
Fuses
Fuses
Figure 10: Redundant Power Supply in a STD 22 system -- Principle--