RS422串行口针脚定义图 引脚定义.doc

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1、RS422串行口针脚定义图引脚定义计算机侧RS-422串行接口的插口是25针公插：设备侧RS-422串行接口插头是25针母插： 引脚定义PinNameDirDescription1GNDShieldGround2SRISignalRateIndicator3n/c-Spare4SDSendData5STSendTiming6RDReceiveData7RTSRequestToSend8RRReceiverReady9CTSClearToSend10LLLocalLoopback11DMDataModem

2、12TRTerminalReady13RRReceiverReady14RLRemoteLoopback15ICIncomingCall16SF/SRSelectFrequency/SelectRate17TTTerminalTiming18TMTestMode19GNDGround20RCReceiveTwister-PairCommon21GNDSpareTwister-PairReturn22/SDSendDataTPR23GNDSendTimingTPR24GNDReceiveTimingTPR

3、25/RSRequestToSendTPR26/RTReceiveTimingTPR27/CSClearToSendTPR28ISTerminalInService29/DMDataModeTPR30/TRTerminalReadyTPR31/RRReceiverTPR32SSSelectStandby33SQSignalQuality34NSNewSignal35/TTTerminalTimingTPR36SBStandbyIndicator37SCSendTwisterPairCommon