Detailed descriptions
16.1 Motherboard
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
139
Pin assignment of the internal USB connector, X420
Pin no.
Short name
Meaning
Input / output
1
VCC
+ 5 V (fused)
Output
2
Key
–
–
3
-Data USB1
Data channel
Input / output
4
-Data USB3
Data channel
Input / output
5
+Data USB1
Data channel
Input / output
6
+Data USB3
Data channel
Input / output
7
GND
Ground
–
8
GND
Ground
-
9
GND
Ground
–
10
Key
–
–
Note
Contact Customer Support or the Repair Center for detailed information on pin assignments
of the interfaces.
SATA data interface, X5, 6, 7, 8 (shielded connector)
Pin no.
Short name
Meaning
Input / output
1
GND
Ground
-
2
TX-P
Transmitter positive
Output
3
TX-N
Transmitter negative
Output
4
GND
Ground
-
5
RX-N
Receiver negative
Input
6
RX-P
Receiver positive
Input
7
GND
Ground
-
Pin assignment of the power supply fan monitoring interface, X130
Pin no.
Short name
Meaning
Input / output
1 to 3
Reserved
-
-
4
Tacho signal
Monitoring signal
Input
5 - 7
Reserved
-
-
8
Ground
-
-