Siemens SIMATIC Box PC 620 Manual page 152

Hardware Information
PS/2 Keyboard with Trackball Port
You can connect an external keyboard to your SIMATIC Box PC 620.
The connector has the following pinout:
Figure 8-5 Connector Pinout for an External Keyboard Connecting Cable
Pin-No.
1
2
3
4
5
6
8-20
6
4
2
View onto the socket
Designation
Data line, keyboard
Data line
0V
Current limited 5V power supply
Clock line, keyboard
Clock line, trackball
5
3
1
Input/Output
Input/output
Input/output
-
Output
Input/output
Input/output
SIMATIC Box PC 620 Manual
C79000-G7076-C639-04