User`s guide

Chapter 2
20
HPC-1010 User’s Manual
 COM port
COM port with the pin definitions.
COM1RS-232 / 422 / 485 Port DB-9
Pin RS-232 RS-422
Half Duplex
RS-485
Full Duplex
RS-485
1
DCD
TX-
DATA-
TX-
2
RXD
RX+
N/A
RX+
3
TXD
TX+
DATA+
TX+
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 RI RI
Figure 6 COM port
COM