Technical data

Hardware Information
6-18
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
PS/2 trackball/keyboard port
You can connect an external keyboard to your computing unit. The port is assigned
as follows:
Connector –
View of Socket
Pin
No.
Name Input/
Output
1 Keyboard data Input/Output
2 Trackball data lead Input/Output
5
6
3 0 V -
3
4
4 Current limited 5V power
supply
Output
12
5 Keyboard clock line Input/Output
12
6 Trackball clock lead Input/Output
USB port
The Universal Serial Bus port is assigned as follows:
Connector Contact Number Signal Name
4
1 VCC
4
3
2 - Data
2
3 + Data
1
4 Ground
The connector is a type A connector.
The port is rated as a high current USB (500 mA).