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
2.6Cooling
2.7GroundingandBonding
2.8StandardizedSignaling
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
3.1VoiceandVisualAnnunciatorOutputs
3.2AircraftInterfaces
3.3TCASInterfacewithModeSTransponder
3.4TCASDisplays
3.5DiscreteSignals
3.6ProgramPinsandOtherMeanofDeterminingConfiguration
3.7TestPins
4.0FUNCTIONALTEST,MONITORING,ANDBUILT-INTESTEQUIPMENT
(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
5.4D-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
ATTACHMENT1A-TCAS/DUALMODESARCHITECTURE
ATTACHMENT1B-TCAS/DUALMODESINTRASYSTEMDATALINK
DIAGRAM
ATTACHMENT1C-1-TCASDISPLAYANDANNUNCIATIONINTERFACE
DIAGRAM
ATTACHMENT1C-2-TCASDISPLAYANDANNUNCIATIONINTERFACE
DIAGRAM
ATTACHMENT1D-TCAS/DUALMODESPOWERINPUTCONFIGURATION
DIAGRAM
ATTACHMENT1E-1-DIGITALINPUTSIGNALDIAGRAM
ATTACHMENT1E-2-TCASWITHADS-BDIGITALINPUTSIGNALDIAGRAM
ATTACHMENT1F-TCASWITHADS-BDIGITALOUTPUTSIGNALDIAGRAM
ATTACHMENT1G-TCASWITHADS-BPROGRAMPINSIGNALDIAGRAM
ATTACHMENT2-TRAFFICCOMPUTERCONNECTORANDPOSITIONING
ATTACHMENT3A-STANDARDINTERWIRING
ATTACHMENT3B-NOTESAPPLICABLETOTHESTANDARDINTERWIRING
ATTACHMENT4-TCASCOMPUTERUNITCONNECTORINSERTLAYOUT
ATTACHMENT5A-MODEAREPLYCODECOMBINATIONS
ATTACHMENT5B-ATCRBSREPLYCODEPULSECHARACTERISTICS
ATTACHMENT6-DATAWORDSAPPLICABLETOTRAFFICCOMPUTER
(TCASWITHADS-B)
ATTACHMENT7A-INPUT/OUTPUTCIRCUITSTANDARDS
ATTACHMENT7B-ARINC429TRANSMITTERLOGICSTATES
ATTACHMENT8-SUPPRESSIONPULSESYSTEMCHARACTERISTICS
ATTACHMENT9A-TYPICALBLADEANTENNA
ATTACHMENT9B-BEARINGANTENNAMOUNTINGLAYOUT
ATTACHMENT9C-TCASANTENNAENVELOPE
ATTACHMENT9D-AIRCRAFTINSTALLATIONS
ATTACHMENT10-TCASANTENNACONFIGURATION
ATTACHMENT11-NOTUSED
ATTACHMENT12-TCAS-TRANSPONDERINTERFACEBUS
ATTACHMENT13-ENVIRONMENTALTESTCATEGORIES
ATTACHMENT14-1-STANDARDVSI/TCASDISPLAYINTERWIRING
ATTACHMENT14-2-NOTESTOSTANDARDVSI/TCASDISPLAY
INTERWIRING
ATTACHMENT14-3-STANDARDVSI/TCASDISPLAYCONNECTORLAYOUT
ATTACHMENT15-1-ALTERNATE#1VSI/TCASDISPLAYINTERWIRING
ATTACHMENT15-2-NOTESTOALTERNATE#1VSI/TCASDISPLAY
INTERWIRING
ATTACHMENT15-3-ALTERNATE#1VSI/TCASCONNECTORLAYOUT
ATTACHMENT16-1-ALTERNATE#2VSI/TCASDISPLAYINTERWIRING
ATTACHMENT16-2-NOTETOALTERNATE#2VSI/TCASDISPLAY
INTERWIRING
ATTACHMENT16-3-ALTERNATE#2VSI/TCASCONNECTORLAYOUT
ATTACHMENT17-1-ALTERNATE#3VSI/TCASDISPLAYINTERWIRING
ATTACHMENT17-2-NOTESTOALTERNATE#3VSI/TCASDISPLAY
INTERWIRING
ATTACHMENT17-3-ALTERNATE#3VSI/TCASCONNECTORLAYOUT
ATTACHMENT18-TCASSYSTEMFUNCTIONALTESTNORMALOUTPUT
DEFINITION
ATTACHMENT19-DATAWORDSAPPLICABLETORTCADO-185AAND
DO-185B
ATTACHMENT19A-TCAS/TRANSPONDERLABELUSAGERTCADO-185A/B
COMPATIBLEEQUIPMENT
ATTACHMENT19B-TCAS/TRANSPONDERCOORDINATIONBUSDEFINITION
RTCADO-185A/BCOMPATIBLEEQUIPMENT
ATTACHMENT19C-TRANSPONDERTOTCAS(XT)XTWORD6RTCADO-185A/B
COMPATIBLEEQUIPMENT
ATTACHMENT19D-TCASTOTRANSPONDER(TX)TXWORD2RTCADO-185A/B
COMAPTIBLEEQUIPMENT
ATTACHMENT19E-TCASTOTRANSPONDER(TX)TGDPROTOCOLRTCA
DO-185A/BCOMPATIBLEEQUIPMENT
ATTACHMENT19F-TCASTOTRANSPONDER(TX)RESOLUTIONADVISORIES
REPORTRTCADO-185A/BCOMPATIBLEEQUIPMENT
ATTACHMENT19G-TCASTOTRANSPONDER(TX)DATALINKCAPABILITY
REPORTRTCADO-185ACOMPATIBLEEQUIPMENT
ATTACHMENT19H-TCASTOTRANSPONDER(TX)REQUESTFORGICBDATA
RTCADO-185A/BCOMPATIBLEEQUIPMENT
ATTACHMENT19J-TRANSPONDERTOTCAS(XT)XGDPROTOCOLRTCA
DO-185A/BCOMPATIBLEEQUIPMENT
ATTACHMENT19K-TCASTOTRANSPONDER(TX)DATALINKCAPABILITY
RTCADO-185BCOMPATIBLEEQUIPMENT
ATTACHMENT19L-TCASTOTRANSPONDER(TX)ACASUNITANDSOFTWARE
PARTNUMBERRTCADO-185BCOMPATIBLEEQUIPMENT
ATTACHMENT20A-DISPLAYTRAFFICINFORMATIONFILE(DTIF)FORMAT
ATTACHMENT20B-DISPLAYTRAFFICINFORMATIONFILE(DTIF)STRUCTURE
TCASTODISPLAY
ATTACHMENT20C-DISPLAYTRAFFICINFORMATIONFILE(DTIF)DATATYPE
WORDSTRUCTURE
ATTACHMENT20D-DISPLAYTRAFFICINFORMATIONFILE(DTIF)START
OFFILEPROTOCOL-STX
ATTACHMENT20E-DISPLAYTRAFFICINFORMATIONFILE(DTIF)START
OFFILEPROTOCOL-ETX
ATTACHMENT20F-DISPLAYTRAFFICINFORMATIONFILE(DTIF)HEADER
ATTACHMENT20G-DISPLAYTRAFFICINFORMATIONFILE(DTIF)PACKET
HEADER
ATTACHMENT20H-1-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
FLIGHTIDWORD(CHAR#1,#2,#3)
ATTACHMENT20H-2-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
FLIGHTIDWORD(CHAR#4,#5,#6)
ATTACHMENT20H-3-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
FLIGHTIDWORD(CHAR#7,#8)
ATTACHMENT20I-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
TRAFFICRANGE,ALTITUDE,ANDBEARINGWORD
ATTACHMENT20J-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
VERSION0TRAFFICLATITUDE,LONGITUDE,AND
RELATIVEALTITUDE
ATTACHMENT20K-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
VERSION1TRAFFICLATITUDE,LONGITUDE,AND
VERTICALSPEED
ATTACHMENT20L-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
3TRAFFICGROUNDSPEED,TRACKANGLE,AND
CLOSURERATE
ATTACHMENT20M-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
INTRUDERINFORMATIONQUALITY
ATTACHMENT20N-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
INTRUDERINFORMATIONLENGTH/WIDTHWORD
ATTACHMENT20P-DISPLAYTRAFFICINFORMATIONFILE(DTIF)TYPE
7TIMEOFAPPLICABILITY(UTCANDUTCFINE)
APPENDICES
APPENDIXA-ACRONYMLIST
APPENDIXB-LABEL270,RESOLUTIONADVISORYWORD,REPORTING
COMBINATIONS Abstract
Specifies a Traffic Computer with Traffic Alert and Collision Avoidance System (TCAS) functionality that provides the necessary interface definitions and protocols to accommodate the requirements of RTCA DO-185B: Minimum Operational Performance Standards for TCAS.
