Advantech MIC-3318 manual Serial Ports COM1 and COM2 Mode RS-232/ 422/485

Table 1-3: Clear CMOS

CMOSJP6

1 2 3

Clear

1 2 3

Normal

1.5.6Serial 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
2	4	6	8	10	12	14	16	18
RS-232

RS-422

RS-485

1	3	5	7	9	11	13	15	17
2	4	6	8	10	12	14	16	18
1	3	5	7	9	11	13	15	17
2	4	6	8	10	12	14	16	18

1 3 5 7 9 11 13 15 17

Chapter 1 Hardware Configuration 1 1