User manual

Page 153
PPC-5170GS Flat Panel PC
CN20A: Serial Port DB-9 Male Connector (COM1)
PIN Description
1 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 Connector
COM2 Support three modes: RS-232, RS-422 and RS-485 (via 2 x 5 pin box header
connector).
RS-232 Mode
PIN Description PIN Description
1 DCD 2 DSR
3 RXD 4 RTS
5 TXD 6 CTX
7 DTR 8 RI
9 GND 10 NC
RS-422 Mode
PIN Description PIN Description
1 TXD- 2 RX-
3 TXD+ 4 RX+
5 NC 6 NC
7 NC 8 Voltage
9 NC 10 NC