COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin #
10
JBAT1: Clear CMOS Setting
RS-232
1
DCD
2
RX
3
TX
4
DTR
5
Ground
6
DSR
7
RTS
8
CTS
9
RI
NC
JBAT1
IB957 User's Manual
Signal Name
R2-422
RS-485
TX-
DATA-
TX+
DATA+
RX+
RX-
Ground
Ground
RTS-
RTS+
CTS+
CTS-
NC
Setting
Normal
Clear CMOS
INSTALLATIONS
NC
NC
NC
NC
NC
NC
NC
11