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Detailed descriptions
16.1 Motherboard
Pin assignment of the HDD fan interface, X131
Pin no.
1
2
3
4
Pin assignment of the front fan interface, X132
Pin no.
1
2
3
4
140
Short name
Meaning
GND
Ground
VCC
5 V to +12 V, regulated
Tacho signal
Monitoring signal
-
Reserved
Short name
Meaning
GND
Ground
VCC
+12 V fused
Tacho signal
Monitoring signal
PWM
Speed setting
Input / output
-
Output
Input
-
Input / output
-
Output
Input
Output
SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
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