RS232C Port WiringFP2−CCU4 − 74.2 Wiring between RS232C Ports4.2.3 Connections with RS232C DevicesConnections with an RS232C device that has a D−sub 9−pin connector should be madeas follows.Pin No.123456789FGSDRDRSCSDRSGCDERComputer CommunicationUnit sideFGSDRDRS(CS)SG(CD)ERPin No.123456789RS232C side (9−pin)Mnemonic Mnemonic− The “CS” and “CD” signals from the partner device are set invalid on theComputer Communication Unit side, so no connections are necessary.− Depending on the RS232C device, there may be times when the devicewill not operate properly if the “CS” and “CD” signals do not go on, sothe “RS” and “CS” signals and the “ER” and “CD” signals on theRS232C device side should be shorted.Tip
