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Chapter 1 Hardware Configuration 11
Table 1-3: Clear CMOS
CMOS JP6
Clear
Normal
123
1 23
1.5.6 Serial Ports (COM1 and COM2) Mode (RS-232/
422/485)
This jumper is used to set the Serial ports to act in RS-232,422 or 485
transmission mode. The transmission mode of COM1 and COM2 ports
can be selected using the following settings of JP1(Pin 1 to 18) and
JP2(Pin 1 to 18) respectively.
1. RS-232 mode: close jumper JP1(5-6, 7-9, 8-10, 13-15, 14-16) for
COM1, JP2(5-6, 7-9, 8-10, 13-15, 14-16) for COM2.
2. RS-422 mode: close jumper JP1(3-4, 9-11, 10-12, 15-17, 16-18) for
COM1, JP2(3-4, 9-11, 10-12, 15-17, 16-18) for COM2.
3. RS-485 mode: close jumper JP1(1-2, 9-11, 10-12, 15-17, 16-18) for
COM1, JP2(1-2, 9-11, 10-12, 15-17, 16-18) for COM2.
Table 1-4: COM 1 Mode (RS-232/422/485 Selection)
CMOS 2F JP1 and JP2
RS-232
RS-422
RS-485
97
8
531
6421012
11 1513
14 16 18
17
97
8
531
6421012
11 1513
14 16 18
17
97
8
531
6421012
11 1513
14 16 18
17