Table of Contents
1.0INTRODUCTIONANDDESCRIPTION
1.1PurposeofthisDocument
1.2SystemDescription
1.3TCAS
1.4UnitDescription
1.5AltitudeReportingData
1.6Interchangeability
1.7RegulatoryApproval
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.2FormFactor,ConnectorsandIndexPinCoding
2.3Interwiring
2.4PowerCircuitry
2.5EnvironmentalConditions
2.6Cooling
2.7GroundingandBonding
2.8StandardizedSignaling
3.0TCASFUNCTIONALDESCRIPTION
3.1AuralAdvisoryandVisualAnnunciatorOutputs
3.2AircraftInterfaces
3.3InterfacewithModeSTransponder
3.4TCASDisplays
3.5DiscreteSignals
3.6ProgramPins
3.7TestPins
4.0FUNCTIONALTEST,MONITORINGANDBUILT-INTEST
EQUIPMENT(BITE)
4.1TCASFunctionalTest
4.2IndicatorResponse
4.3IntegrityMonitorDisplay
4.4Built-InTestEquipment(BITE)
4.5BITEDisplay
4.6FaultMonitor
4.7BITEInitiation
4.8MonitorMemoryOutput
4.9ProvisionsforAutomaticTestEquipment
5.0ANTENNAS
5.1OmnidirectionalAntenna
5.2DirectionalAntenna
5.3EnvironmentalConsiderations
5.4L-bandSystemsPhysicalIsolation
5.5AntennaInstallation
5.6AntennaandCableCharacteristics
5.7Anti-Icing
6.0VSI/TCASDISPLAY
6.1StandardVSI/TCASDisplay
6.2AlternativeTCASDisplayIndicators
6.3IntegralLighting
6.4EnvironmentalConditions
7.0SIMULATORINSTALLATION
7.1UseinSimulators
ATTACHMENTS
1ATCASModeSArchitecture
1BTCAS/DualModeIntraSystemDataLinkDiagram
1CTCASDisplayandAnnunciationInterfaceDiagram
1DTCAS/DualModeSPowerInputConfigurationDiagram
1ETCASInputSignalDiagram
1FTCASOutputSignalDiagram
1GTCASProgramPinSignalDiagram
2TCASComputerUnitConnectorPositioning
3AStandardInterwiring
3BNotesApplicabletotheStandardInterwiring
4TCASComputerUnitConnectorInsertLayout
5AModeAReplyCodeCombinations
5BATCRBSReplyCodePulseCharacteristics
6AARINC429DataBusInterfaceDefinition
6BCoordinationDataBusDefinition
6CDitsControlWordforTCAS
(andModeSTransponder)
6DDitsControlWordforTCAS,ModeS
TransponderandTA/RADisplays
6ETCASVerticalRADataOutputWord
6FReservedforTCASHorizontalRADataOutputWord
6GTCASTrafficAdvisory,IntruderRangeWord
6HTCASTrafficAdvisory,IntruderAltitudeWord
6JTCASTrafficAdvisory,IntruderBearing
EstimateWord
6KStandardARINC429FormatforBus1Word2-
TranspondertoTCAS
6LStandardARINC429FormatforBus1Word8-
TranspondertoTCAS
6MStandardARINC429FormatforBus1Word3-
TranspondertoTCAS
6NStandardARINC429FormatforBus1Word4-
TranspondertoTCAS
6PStandardARINC429FormatforBus1Word5-
TranspondertoTCAS
6QStandardARINC429FormatforBus1Word6-
TranspondertoTCAS
6RStandardARINC429FormatforBus1Word7-
TranspondertoTCAS
6SStandardARINC429FormatforBus1Word1-
TCAStoTransponder
6TStandardARINC429FormatforBus2Word1-
TCAStoTransponder
6UStandardARINC429FormatforBus2Word2-
TCAStoTransponder
6VStandardARINC429FormatforBus2Word3-
TCAStoTransponder
6WStandardARINC429Format-FMStoTCAS
6XAltitudeSelectLimitsWord
6YTCASFaultSummaryWord
6Z-1TCASDisplayStartofTransmission(STX)
RecordWord
6Z-2TCASDisplayTextDisplayDataControlWord
6Z-3TCASDisplayTextDisplayDataCharacterWord
6Z-4TCASDisplayEndofTransmission(EOT)Word
7AInput/OutputCircuitStandards
7BARINC429TransmitterLogicStates
8SuppressionPulseSystemCharacteristics
9ATypicalBladeAntenna
9BBearingAntennaMountingLayout
9CTCASDirectionalAntennaEnvelope
9DAircraftInstallations
10TCASAntennaConfiguration
11FigureDeleted
12ARINCHighSpeedBus(100KHZProtocol)for
TCAS-Transponder
Interface
13EnvironmentalTestCategories
14-1StandardVSI/TCASDisplayInterwiring
14-2NotestoStandardRADisplayInterwiring
14-3StandardVSI/TCASDisplayConnectorLayout
15-1AlternateNo.1VSI/TCASDisplayInterwiring
15-2NotestoAlternateNo.1VSI/TCASDisplay
Interwiring
15-3AlternateVSI/TCASConnectorLayout
16-1AlternateNo.2VSI/TCASDisplayInterwiring
16-2NotestoAlternateNo.2VSI/TCASDisplay
Interwiring
16-3RAOnlyVSI/TCASConnectorLayout
17-1AlternateNo.3VSI/TCASDisplayInterwiring
17-2NotestoStandardRADisplayInterwiring
17-3AlternateNo.3VSI/TCASConnectorLayout
18TCASSystemFunctionalTestNormalOutput
Definition
APPENDICES
1ATARecommendedStandardsforTCASIIDisplay,
SymbologyandControls
2Label270,ResolutionAdvisoryWord,
ReportingCombinations Abstract
Covers a Traffic Alert and Collision Avoidance System (TCAS) designed specifically for installation in a commercial type aircraft. The system monitors the trajectory of these aircraft for the purpose of determining if any of them constitute a potential collision hazard.
