Com2 Ring Signal Select (Jp1); Clear Cmos (Jp2); Rs-232/422/485 Setting (Jp4) - Aaeon SBC-657B Manual

Half-Size CPU Ca r d

2.7 COM2 Ring signal select (JP1)

The COM2 port can be selected as RS-232, RS-422 or RS-485 by
setting both JP1 and JP2. The following chart shows the jumper
setting.
J P 1
1-2
3-4
5-6

2.8 Clear CMOS (JP2)

JP2 is used when CMOS data needs to be reset. To reset, cap 2-3
closed for few seconds, then move the jumper back to 1-2 closed.
J P 2
1-2
2-3

2.9 RS-232/422/485 Setting (JP4)

J P 4
1-2, 4-5, 7-8, 10-11
2-3, 5-6, 8-9, 11-12
Chapter 2 Quick Installation Guide
S B C - 6 5 7 B / H S B - 6 5 7 I
Function
Ring (Default)
5V
12V
Function
Normal (Default)
Clear
Function
RS-232 (Default)
RS-422/485
2 - 14