User's Manual Part 2

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.
4--76
(a) Digital Input
T
2
CAS accepts ARINC 429 Vertical Speed inputs from Inertial Systems, GPS
Systems and Digital Air Data Systems (DADC).
IRS systems supported: ARINC 705 Attitude Reference and Heading System
(AHRS), ARINC 738 Air Data Inertial Reference System (ADIRS), and other
non-- ARINC standard interfaces.
GPS systems supported: ARINC 743 or ARINC 743A.
DADC systems supported: ARINC 706 Air Data Computer (ADC), ARINC 738 Air
Data Inertial Reference System (ADIRS) and other non--ARINC standard
interfaces.
(b) Analog Input
The electrical pin connection for the analog Altitude Rate is listed under
Table 4--6 of the TAWS/RWS Non--Conigurable Pinout and Pin Description
section.
T
2
CAS can also process ARINC 575/595 analog DC Altitude Rate inputs. The
DC altitude rate input consists of a positive and negative reference voltage
(nominally +12.0 Vdc) and a signal input which can range between the positive
and negative reference input.
(2) Ground Speed
The T
2
CAS Digital Ground Speed input parameter is updated from a GPS, Flight
Management Systems or Inertial source. GPS/FMS would be the primary source, an
Inertial source would only be used in the short --term during GPS drop--outs.
GPS system supported: ARINC 743/743A.
FMC system supported: ARINC 702 Flight Management System and other
non-- ARINC standard interface.
Inertial systems supported: ARINC 704 Inertial Reference System (IRS), ARINC 705
Attitude Reference and Heading System (AHRS), ARINC 738 Air Data Inertial
Reference System (ADIRS), ARINC 743A GPS and other non--ARINC standard
interfaces.
The minimum External Sensor input accuracy accepted for Ground Speed is 2 Kts
from a primary source (GPS/FMS) and 12 Kts from a secondary (Inertial) source.
(3) True Track Angle
The T
2
CAS Digital True Track Angle input parameter is updated from a GPS, Flight
Management Systems or Inertial source. GPS/FMS would be the primary source, an
Inertial source would only be used in the short --term during GPS drop--outs.