User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
10 FMC Interface
The TAWS/RWS function uses Ground Speed, True Track Angle,
Flight Path Angle, Aircraft Weight, Latitude, Longitude and True
Heading from an FMC system.
TAWS/RWS can accept up to two digital ARINC 429 inputs from an
ARINC 702 Flight Management Computer system or other non-
ARINC standard interfaces.
11 GPS/GNSS
The TAWS/RWS function uses Vertical Speed, Ground Speed, True
Track Angle, Latitude, Longitude, Altitude MSL, WGS 84 altitude and
True Heading from a GPS system.
NOTE:
World Geodetic System (WGS) 84 altitude is another type of
MSL altitude.
T
3
CAS accepts up to three digital ARINC 429 inputs from an ARINC 743
or ARINC 743A GPS System, or other non-standard ARINC interfaces
that meet the minimum input signal requirements.
(b) TCAS System Interfaces
1 Mode S Transponder Interface
The T
3
CAS computer contains two sets of ARINC 429 high-speed
busses for communication with two Mode S transponders. It uses
ARINC 718A/735B communication protocol (2 inputs, 2 outputs).
Only 1 input is used when the embedded Mode S transponder is
activated.
2 TCAS Display Bus Interface
The TCAS function has four sets of ARINC output busses for display
of traffic and resolution advisories.
The TA/RA Display No.1 and No.2 busses are high-speed ARINC
429 busses that contain both traffic information and resolution
advisory information. The busses function according to either the
ARINC 735B characteristics, or can optionally be set for the
Honeywell EFIS characteristics through a program input pin (RMP-
12C). For each bus, a valid discrete input is provided that indicates
whether the display is functional.
The RA Display No.1 and No.2 busses are low-speed ARINC 429
busses that contain only resolution advisory information. The busses
function according to the ARINC 735B characteristics. For each bus,
a valid discrete is provided that indicates whether the display is
functional.
The RA Display No.1 and No.2 busses can be configured for a 429
Data Recorder function by grounding programming pin (RMP-11D).
In this mode, the busses are configured for high-speed operation.
Pub. No. 8600200-001, Revision 004
34-45-29
1-57
04 Nov 2014
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