Detailed descriptions
16.1 Motherboard
SIMATIC Rack PC 840 V2
Operating Instructions, Edition 05/2006, A5E00248055-04
16-7
PS/2 keyboard port, X23
Pin assignment of the port:
PS/2, X23
Pin No. Abbreviations
Meaning
Input /Output
1
DAT
Data channel, keyboard Input/output
2
–
n.c.
–
3
GND
Chassis ground
–
4
P5VFK
+ 5 V (fused)
Output
5
CLK
Clock channel,
keyboard
Input/output
6
–
n.c.
–
USB 2.0 ports, X36
The Universal Serial Bus port has the following pinout:
USB 2.0 port
Pin No.
Abbreviations
Meaning
Input /Output
1
VCC
+ 5 V (fused)
Output
2
– Data
Data channel
Input /Output
3
+ Data
Data channel
Input /Output
4
GND
Chassis ground
–
The connectors are of type A.
The ports are rated as high-current USB 2.0 (500 mA).
