1234
ST1
4-pin plug connector: ST1A/ST1B
1234
ST2
5
5-pin plug connector: ST2
3-11
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
3.3 Connector Assignment of Keyboard Controller
Figure 3-1 Location of the Plug Connectors on the Controller Board
Connector for External Keyboard
Pin Description
1
CLOCK
2
+5 V
3
GND
4
DATA
Connector for Keyboard Port on CPU
Pin Description
1
GND
2
+5 V
3
CLOCK
4
DATA
5
unassigned
Keyboard Controller (PC FI45 V2)
Siemens Distributor
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