Raytheon 138-119, Operator'S And Service Manual

Page: 4 / 55

Change Over Box
138--119
II
3769DOC000001
Edition: December 08, 2005
COMMERCIAL NOTES
Change Over Box in application with GG--R and GGM--R
"
Not all Status messages/Alarms are displayed at the Operator Unit.
It has to be assured that all the alarm--contacts of both Distribution
Units (system Failure) are connected to an external Alarm Units.
"
The DV--Bus is not switched--over by the Change Over Box.
"
A difference alarm (G/G or G/M) does not lead to a switch--over in the
Change Over Box.
"
At one of the two Operator Units the automatic switch--over--function
G --> G or G --> M has to be set. Thus ensures a switching --over
from a failed selected sensor to the next heading sensor in function.
"
Connected repeater should be configured in such a manner, that
heading from a gyro is as well indicated as heading from a magnetic
sonde.
"
Information and/or data to operate the compass have to be stored
twice (for each Distribution Unit), by operating the Change over
Switch into the respective position.