PPC-5190 Flat Panel PCPage 157CN22: Serial Port DB-9 Male Connector (COM4)PIN Description1 DATA CARRIER DETECT (DCD)2 RECEIVE DATA (RXD)3 TRANSMIT DATA (TXD)4 DATA TERMINAL READY (DTR)5 GROUND (GND)6 DATA SET READY (DSR)7 REQUEST TO SEND (RTS)8 CLEAR TO SEND (CTS)9 RING INDICATOR (RI)COM5: Serial Port 2x5 Pin Header ConnectorPIN Description PIN Description1 DCD 2 DSR3 RXD 4 RTS5 TXD 6 CTX7 DTR 8 RI9 GND 10 NCCOM6: Serial Port 2x5 Pin Header ConnectorPIN Description PIN Description1 DCD 2 DSR3 RXD 4 RTS5 TXD 6 CTX7 DTR 8 RI9 GND 10 NC
