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JP1: LCD Panel Power Selection
JP1 LCD Panel Power
3.3V
5V
JP2: ATX/AT Mode Select
JP2 ATX / AT
ATX mode
AT mode
JP3, JP4, JP5: RS232/422/485 (COM2) Selection
COM1/3/4 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
11 DCD TX- DATA-
13 RX TX+ DATA+
15 TX RX+ NC
17 DTR RX- NC
19 Ground Ground Ground
12 DSR RTS- NC
14 RTS RTS+ NC
16 CTS CTS+ NC
18 RI CTS- NC
20 NC NC NC
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MI810 User’s Manual