INSTALLATIONS
JP3, JP4, JP5: RS232/422/485 (COM2) Selection
COM1 is fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings for COM2 selection.
COM2
Function
RS-232
RS-422
RS-485
Jumper
Setting
(pin closed)
JP5:
1-2
JP4:
3-5 & 4-6
JP3:
3-5 & 4-6
JP5:
3-4
JP4:
1-3 & 2-4
JP3:
1-3 & 2-4
JP5:
5-6
JP4:
1-3 & 2-4
JP3:
1-3 & 2-4
COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin #
Signal Name
RS-232
R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX-
NC
5 Ground Ground Ground
6 DSR RTS-
NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
10 NC
NC
NC
MI930 User’s Manual
11
