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--33
13
Decision Height
The TAWS/RWS function uses selected Decision Height and/or Minimum
Descent Altitude for the generation of audio call-- outs. TAWS/RWS can
accept ARINC 429 inputs or a discrete input.
14
Decision Height/Minimum Descent Altitude Switch
A Flight Deck switch can be used to select either Decision Height or
Minimum Descent Altitude for audio call-- out altitude determination.
15
Flap/Slat Settings
TAWS/RWS function uses Flap/Slat settings for TAWS and Windshear alerts.
TAWS/RWS can accept ARINC 429 Flap/Slat Setting inputs from a source
such as a Digital Stall Warning Computer (DSWC) or other data concentrator
devices. TAWS/RWS also accepts Analog inputs in the form of 3--Wire AC
Synchros, DC absolute, DC ratio -- metric and Discrete Inputs.
16
Weight and Balance System (WBS)
The TAWS/RWS function obtains Current Aircraft Weight from an A429
Digital Weight and Balance System source.
(2) Discrete Inputs
The T
2
CAS has various discrete inputs available for implementing various TCAS and
TAWS/RWS functions. For the TCAS function, the input logic status is defined in
accordance with ARINC 735A. For the TWAS/RWS function, the input definition is
defined by the ASDB for the specific aircraft type.
(3) Program Inputs
The T
2
CAS has various program inputs a vailable for TCAS unit configuration and
installation programming. Input logic status is defined according to ARINC 735A
definition.
The T
2
CAS utilizes the ASDB database for TAWS/RWS unit configuration and
installation programming.
The ASDB defines the assignment of the connector pins to each signal, the criteria
for determining the value and status of each signal and the signal specific filtering
and processing requirements.
(4) Discrete Outputs
The T
2
CAS TAWS function contains 13 discrete outputs that are used to provide
annunciation of alerts and system status. For the TCAS function, the output logic
status is defined in accordance with ARINC 735A. For the TAWS/RWS function, the
output definition is defined by the ASDB for the specific aircraft type.