User's Manual Part 1

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
1--14
Further breakdown of the TCAS and TAWS/RWS system configurations are detailed in
the sections 1 and 2 that follow.
(1) TCAS System Configuration
The T
2
CAS unit’s TCAS function may be installed in several different configurations
depending on the transponders used and the choice of antennas and displays.
Some typical configurations are shown in Figure 1--5. Other combinations are
feasible. Figure 1--7 shows the signals and overall interconnects for a typical T
2
CAS
installation with dual transponders.
• Configuration A shows the TCAS function linked to dual Mode S transponders.
The system operates with either transponder, depending on the control panel
selection. The second transponder is used as a backup.
• Configuration B shows the TCAS function linked to a single transponder Mode S
transponder system.
• Configuration C shows the TCAS function to a single Mode S transponder (active)
and an ATCRBS transponder (backup). The TCAS only operates when the Mode
S transponder is selected.
(2) TAWS/RWS System Configuration
Figure 1--6 illustrates a typical aircraft installation of the T
2
CAS. The system is
designed as an integrated safety solution, available as a replacement to the existing
TCAS 2000 LRU. Figure 1--7 is a TCAS Function System block diagram.