Hardware Information
7-25
SIMATIC Rack PC 840 Manual
A5E00104826-03
Assignment for Fan Supply, X41, X42, X43
Pin No.
Designation
Description
Input / Output
1
GND
Ground
–
2
+12V
Switched power supply
Output
3
CPU FAN_CLK
Speed signal for
monitoring
Input
Assignment for Uncontrolled Fan Supply, X40
Pin No.
Designation
Description
Input / Output
1
GND
Ground
–
2
+12V
Power supply
Output
3
NC
–
–
Assignment for SCSI Activity Connector, X39 Type JST B2B-PH-SM3-TB
Pin No.
Designation
Description
Input / Output
1
NC
–
2
SCSI HD_N
0V levell means that SCSI
port is active
Input
Summary of Contents for SIMATIC Box PC 840
Page 8: ...Preface viii SIMATIC Rack PC 840 Manual A5E00104826 03 ...
Page 179: ...B 1 SIMATIC Rack PC 840 Manual A5E00104826 03 Technical Specifications B ...
Page 208: ...Glossary Glossary 22 SIMATIC Rack PC 840 Manual A5E00104826 03 ...
Page 212: ...Index Index 4 SIMATIC Rack PC 840 Manual A5E00104826 03 ...