PPC-5190 Flat Panel PCPage 153B.4 Serial PortsThe POS-8520 offers six high speed NS16C550 compatible UARTs with Read/Receive 16byte FIFO serial port (COM1/COM2/COM3/COM4/COM5/COM6)COM1: Serial Port 2x5 pin header ConnectorPIN Description PIN Description1 DCD 2 DSR3 RXD 4 RTS5 TXD 6 CTX7 DTR 8 RI9 GND 10 NCCN20A: Serial Port DB-9 Male Connector (COM1)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)COM2: Serial Port 2 x 5 Pin Header ConnectorCOM2 Support three modes: RS-232, RS-422 and RS-485 (via 2 x 5 pin box headerconnector).
