Redundant Voltage Supply - Raytheon 138-119 Operator's And Service Manual

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).
Magnetic
Sonde 1
Operator
Unit 1
Gyro 1
Fuses
Figure 10: Redundant Power Supply in a STD 22 system -- Principle--
Edition: April 06, 2005
Change Over Box
Signals
Change
Over Box
E1 E2
Distribution Unit 1
Power Supply 1
138- -119
Supply voltage
E1 E2
2 1
Distribution Unit 2
2
1
Power Supply 2
28
Fuses
Magnetic
Sonde 2
Operator
Unit 2
Gyro 2
E2
E1
Fuses
3769DOC000002