Manual for MI42N Motherboard
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KETTOP TECHNOLOGY LIMITED
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WWW.KETTOP.COM
Pin for accessing extended USB2.0.
Pin spacing
：
2.54mm
27. RS232/RS485 Function switch jumper (J1C2)
Pin spacing
：
2.0mm
28. RS232/RS485 Function switch jumper (J2C2)
Pin spacing
：
2.0mm
29. System Fan Header
For connecting fan of the system
Pin#
Signal
Pin#
Signal
1
+5V DC
2
+5V DC
3
D-
4
D-
5
D+
6
D+
7
Ground
8
Ground
9
KEY (no pin)
10
No Connect
Function select
Connecting pins
RS232
1-3,2-4
RS485
3-5
，
4-6
Function select
Connecting pins
RS232
1-2
RS485
3-4
，
5-6
