User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
34−43−23
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Page 1−11
15 Dec 2005
TCAS 3000 UNITS AIRCRAFT INTERFACE UNITS
AD−31666−R2@
NOTE: DASHED BOXES / LINES DENOTE OPTIONAL ALTERNATE
COMPONENTS. THE PTM IS AN ALTERNATE FOR THE ADC
AND THE EFIS IS AN ALTERNATE FOR THE VSI/TRA.
Figure 1−4. Basic TCAS ll Installation
B. System Configurations
The TCAS 3000 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 1−6 shows the signals
and overall interconnects for a typical TCAS 3000 installation with dual transponders.
• Configuration A shows the TCAS 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 linked to a single transponder Mode S transponder
system.
• Configuration C shows the TCAS linked to a single Mode S transponder (active) and
an ATCRBS transponder (backup). The TCAS only operates when the Mode S
transponder is selected.