190-01561-00
GIA 6300 Installation Manual
Draft1
Page 10
Note 2: See the Environmental Qualification Form for details on surge rating and minimum/maximum
operating voltages.
7
Environmental Qualifications
Reference the Environmental Qualification Form in Requiem
8
System Interconnect
8.1
Unit Level Connections
Figure XXX shows the electrical top level design of the GIA 6300. The GIA 6300 consists of 9 separate
circuit boards and the GPS module. External interfaces are passed through the IO Board to the Main A,
Main B, COM Digital, NAV, and Audio boards.
Main A
Main B
NAV
Glideslope
GPS
COM Digital
COM RF
Audio
IO Board
8.1.1
Main A and Main B Redundancy
Main A and Main B in the GIA6300 function as two independent units, allowing for separation and
redundancy in each GIA. Both GIA 1 and GIA 2 are connected to the sensors, but in each GIA, Main A
and Main B can be connected to a different set of sensors (i.e. Main A is connected to all primary
sensors and Main B is connected to all redundant sensors). Data is shared between the two main
boards through the inter-processor communication.
The COM Digital, NAV, and the Audio board each connect to both Main A and B so that there is
redundant communication between these components and the rest of the system. It is possible to wire
the aircraft such that a total failure of either Main A or Main B cannot cause a total loss of COM, NAV, or
Audio functionality. In the event of a single Main Board failure, the second main board would still be
capable of tuning the COM, collecting navigation data, and processing autopilot and flight director
functionality (as examples).
