Figure 6 Com Port - Quanmax HPC-1050 User Manual

COM ports
COM ports with the pin definitions.
HPC-1050/1051 User's Manual
COM1~COM2 RS-232 / 422 / 485 Port DB-9
Pin RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI

Figure 6 COM port

COM
Half Duplex
RS-422
RS-485
TX- DATA-
RX+ N/A
TX+ DATA+
RX- N/A
GND GND
N/A N/A
N/A N/A
N/A N/A
RI RI
17
Chapter 2
Full Duplex
RS-485
TX-
RX+
TX+
RX-
GND
N/A
N/A
N/A
RI