Chapter 2
20
UbiQ-100 Series User’s Manual
COM Ports
COM ports with the pin definitions.
COM1 & COM2 RS-232/422/485 Port D-SUB 9P
Pin
RS-232
RS-422
Half Duplex
RS-485
Full Duplex
RS-485
1 DCD TX- DATA- TX-
2 RXD TX+ DATA+ TX+
3 TXD RX+ N/A RX+
4 DTR RX- N/A RX-
5 GND GND GND GND
6 DSR N/A N/A N/A
7 RTS N/A N/A N/A
8 CTS N/A N/A N/A
9 RI RI N/A N/A
Figure 6 COM ports
COM
