Chapter 2 Connecting peripherals 21
RS-232/422/485 connection (COM2)
COM2 is an RS-232/422/485 serial port. The specific port type
is determined by jumper settings JP35 - JP39, as detailed in
Chapter 1. The following table shows the pin assignments for
COM2.
RS-232/485 connector pin assignments
Pin
RS-232
RS-422/485
1
DCD
TX - or send data - (DTE)
2
RX
TX + or send data + (DTE)
3
TX
RX + or receive data + (DTE)
4
DTR
RX - or receive data - (DTE)
5
GND
GND
6
DSR
7
RTS
8
CTS
9
RI
COM 2
5 4 3 2 1
NC 9 8 7 6