Advantech UNO-1170E - Manual (Page 25)

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2.14 PCI/104+ Connectors (UNO-1170E only)
UNO-1170E supports up to two PCI/104+ cards. The cards will be
installed on connector noted "CN3-A" and "CN3-B". Please check your
PC/104+ card support voltage to adjust the jumper on CN4.
Jumper Setting for +3.3V example:
Figure 2.7: RS-422/485 Jumper Settings
Table 2.8: PCI-104 Voltage Jumper Settings
Voltage Jumper close position setting
+5V 1-2
+3.3V 2-3
closed 2-3