Aaeon MB-668 Manual page 9

Quick Installation Guide
COM3/COM4 RS-232/422/485
Selection (JP9)
By manually setting JP9, configurations for COM3/COM4 can be
set corresponding with RS-232/422/485 selection. Please see illus-
tration as follows:
* RS-232
1 3 5
2 4 6
* Default
COM3/COM2 RI Function/Voltage
Selection (JP10)
RI function or voltage selection configurations for COM3/COM2
can be set manually through jumper JP10. Jumper settings are
illustrated as follows:
* RI Function
1 3 5
COM3
2 4 6
7 9 11
COM2
8 10 12
* Default
RS-422
7 1 3
8 2 4
+5Vout
1 3
2 4
7 9
8 10 12
5 7 1
6 8 2
+12Vout
5 1 3
6 2 4
11 7 9
8 10 12
MB-668 Installation Guide
RS-485
3 5 7
4 6 8
5
6
11
9