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1 Dec 2003
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
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Table 15. TPA-100A TCAS Processor Inputs and Outputs
(cont)
Source Or
Destination
Processor I/O Signal
Name and Type
General
Description
OWN ALTITUDE RELATED I/O
Analog Radio Altimeter
No. 1
± Analog Radio Altitude No. 1 Input
AGL altitude data to TCAS processor
from analog radio altimeter No. 1.
Discrete Radio Altitude No. 1 Valid
Radio altimeter No. 1 failure status
input to TCAS processor.
Analog Radio Altimeter
No. 2
± Analog Radio Altitude No. 2
AGL altitude data to TCAS processor
from analog radio altimeter No. 2.
Discrete Radio Altitude No. 2 Valid
Radio altitude No. 2 failure status
input to TCAS processor.
ARINC 429 Digital
Radio Altimeter No. 1
ARINC 429 Digital Radio Altitude
No. 1
ARINC 429 data from digital radio
altimeter No. 1 to TCAS processor.
ARINC 429 Digital Radio
Altimeter No. 2
ARINC 429 Digital Radio Altitude
No. 2
ARINC 429 data from digital radio
altimeter No. 2 to TCAS processor.
Three Strapped Pins on
Processor Rear
Connector
Three discretes from Analog Radio
Altimeter Select Straps
Specify the type of analog radio
altimeter that is connected to the
Analog Radio Altitude No. 1 and No. 2
input (for example, King, Sperry,
Collins, ARINC 552A, etc.).
Strap Pin on Processor
Rear Connector
Discrete input from Radio Altimeter
Interface Select Strap
Tells TCAS processor if one or two
radio altimeters are installed.
OWN AIRCRAFT PERFORMANCE LIMIT AND FLIGHT STATUS RELATED I/O
Optional Performance
Management Computer
Climb Performance Limit Discrete
Tells TCAS processor that after
considering own altitude, attitude,
cargo weight factors, etc. a
performance management computer
has found if it is possible or not
possible for own aircraft to climb at a
rate of 1500 feet for each minute.
Climb Performance Limit ARINC 429
Digital equivalent of climb
performance discrete from a
performance management computer.
