Instruction Manual

FDK172-834 User’s Manual
Hardware and Installation 11
2.3.1 COM port Connector
The pin assignment of RS-232/RS-422/RS-485 is listed on the following table.
Pin
RS-232
RS-422
RS-485
1
DCD
TX-
Data-
2
RXD
TX+
Data+
3
TXD
RX+
No use
4
DTR
RX-
No use
5
GND
GND
GND
6
DSR
No use
No use
7
RTS
No use
No use
8
CTS
No use
No use
9
RI
No use
No use