GFK-1503DChapter4Installation4-154Port2:RS-485PinAssignmentsforPort2Port2isanRS-485portwitha?5-pinfemaleD-subconnector.ThiscanbeattacheddirectlytoanRS-485toRS-232adapter.PinSignalDirectionFunction?SHLD-CableShieldDrainwireconnection2,3,4n/c5P5VOutput+5.?VDCtopowerexternaldevices(?00mAmax.)6RTSAOutputRequesttoSend(A)output7GND-0V/GNDreferencesignal8CTSBInputCleartoSend(B)input9RT-ResistorTermination(?20ohm)forRDA?0RDAInputReceiveData(A)input?RDBInputReceiveData(B)input?2SDAOutputTransmitData(A)output?3SDBOutputTransmitData(B)output?4RTSBOutputRequesttoSend(B)output?5CTSAInputCleartoSend(A)inputShellSHLD-CableShieldwireconnection/?00%(Continuous)shieldingcableshieldconnection4-16VersaMaxPLCUsersManualJanuary2006GFK-1503D4ConnectorandCableSpecificationsforPort2VendorPartnumbersbelowareprovidedforreferenceonly.Anypartthatmeetsthesamespecificationcanbeused.Cable:Belden8?05LowCapacitanceComputercable,overallbraidoverfoilshield5Twisted-pairsShieldDrainWire30Volt/80C(?76F)24AWGtinnedcopper,7x32strandingVelocityofPropagation=78%NominalImpedance=?00?5PinMaleConnector:Type:CrimpVendor:ITT/CannonAMPPlug:DAA?5PK87F0205206-?Pin:030-2487-0?766506-9SolderITT/CannonAMPZDA?5P747908-2-ConnectorShell:Kit*ITTCannonDA?2?073-50?5-pinsizebackshellkit:Metal-PlatedPlastic(PlasticwithNickeloverCopper)CableGroundingClamp(included)40cableexitdesigntomaintainlow-profileinstallationPlusITTCannon250-850?-009ExtendedJackscrew:Threadedwith(metric)M3x0.5forsecureattachmentOrderQty2foreachcableshellorderedCriticalInformationanyotherpartselectedshouldmeetorexceedthisrequirement.GFK-1503DChapter4Installation4-174RS-485PointtoPointConnectionwithHandshakingInpoint-to-pointconfiguration,twodevicesareconnectedtothesamecommunicationline.ForRS-485,themaximumcablelengthis?200meters(4000feet).Modemscanbeusedforlongerdistances.ShieldedTwistedPairsPINPINPLCUpto?5.2meters(50ft)withoutisolationComputer?2?3?0?96?48?5327?SD(A)SD(B)RD(A)RD(B)RTRTS(A)RTS(B)CTS(B)CTS(A)GNDSHLDRD(A)RD(B)SD(A)SD(B)CTS(A)CTS(B)RTS(B)RTS(A)GNDSHLD4-18VersaMaxPLCUsersManualJanuary2006GFK-1503D4RS-485MultidropSerialConnectionsInthemultidropconfiguration,thehostdeviceisconfiguredasthemasterandoneormorePLCsareconfiguredasslaves.Themaximumdistancebetweenthemasterandanyslavemaynotexceed4000feet(?200meters).Thisfigureassumesgoodqualitycablesandamoderatelynoisyenvironment.Amaximumof8slavescanbeconnectedusingRS-485inadaisychainormultidropconfiguration.TheRS-485linemustincludehandshakingandusewiretypeasspecifiedearlier.SlaveStationLastStationMasterWhenwiringRS-485multidropcables,reflectionsonthetransmissionlinecanbereducedbydaisy-chainingthecableasshownbelow.MakeconnectionsinsidetheconnectortobeattachedtothePLC.Avoidusingterminalstripstoothertypesofconnectorsalongthelengthofthetransmissionline.PIN23?2SD(A)?3SD(B)?0RD(A)?RD(B)9RT6RTS(A)?4RTS(B)?5CTS(A)8CTS(B)5+5V70V?SHLDPowerSourceforConverter.Mustbewirednolessthan3meters(?0feet)fromtheconverter.5V0V?5-PINMALEPINRS-485CablesMakeconnectionsinsideD-connectorsTOOTHERPLCsRS-232/RS-485ConverterIC690ACC900?5-PINFEMALERS-485PORT25-PINFEMALERS-232PORT9-PinFemaleto25-PinMaleRS-232ShieldedCable3RD2TD5CTS20DTR8DCD7GND?SHLDRD2TD3RTS7CTS8DCD?DTR4GND5PINPIN9PinMaleConnectorComputerRS-232PortDCD(A)2DCD(B)3RD(A)?0RD(B)?SD(A)?2SD(B)?3RT9CTS(A)?5CTS(B)8RTS(A)6RTS(B)?4+5V50V7SHLD?CPURS-485Port?5PinFemaleConnector*(NC)TerminationresistancefortheReceiveData(RD)signalmustbeconnectedonlyonunitsattheendsoflines.ThisterminationismadeattheCPUbyconnectingajumperbetweenpin9andpin?0insidetheD-shellconnector.GroundPotential:Multipleunitsnotconnectedtothesamepowersourcemusthavecommongroundpotentialorgroundisolationforproperoperationofthesystem.