ETU-01(U) User Manual - CTC Union Technologies Co.,Ltd.

Appendix C. Interface ConnectionsC.3 RS-232 Data Module ConnectorWhen the ETU-01 is ordered with a RS-232 interface, the physical interface is a25-pin female D-type connector wired in accordance with Table C.3.SIGNALFUNCTIONPIN CIRCUIT DIRECTION DESCRIPTIONChassis ground.Shield 1 AA May be isolated from signal ground.SignalGround7 AB Common signal ground.TransmittedData2 BA To ETU-01 Serial digital data from DTE.ReceivedDataRequest toSentClear toSentData SetReadyData TerminalReadyData CarrierDetectExternalTransmitclockTransmitClockReceiveClock3 BB From ETU-0145620CACBCCCDTo ETU-01From ETU-01From ETU-01To ETU-018 CF From ETU-0124 DA To ETU-0115 DB From ETU-0117 DD From ETU-01Serial digital data at the output of the ETU-01receiver.A ON signal to the ETU-01 when datatransmission is desired.Constantly ON.Constantly ON,except during test loops.Not used.Constantly ON, except when a loss of thereceived carrier signal is detected.A transmitted data rate clock input from thedata source.A transmitted data rate clock for use by anexternal data source.A received data rate clock for use by anexternal data source.Table C.3 RS-232 data module connector pin allocation40