Siemens Simatic box pc 627b Operating Instructions Manual page 134

Detailed descriptions
16.1 Motherboard
Pin assignment of the equipment fan, X128
Pin No.
1
2
3
Pin assignment of the supply for the power supply fan, X129
Pin No.
1
2
3
Connection for backup battery, X24 (BATT)
A battery for buffering the CMOS RAM is connected to this connector. This is a 3 V Lithium
battery with a capacity of 750 mAh.
Pin No.
1
2
Tap of the backup battery, X240 (OUT)
This connection is intended for expansion modules with on-board CMOS-RAM. The voltage
of the backup battery can be tapped here to backup the CMOS RAM data of the expansion
module.
Pin No.
1
2
Notice
No battery should be connected to this connection.
Pin assignment of the supply for the serial ATA drives X25, X26, X602
Pin No.
1
2
3
4
5
16-16
Abbreviation
GND
+12 V
CPU FAN_CLK
Abbreviation
GND
+12 V
PG1 FAN_CLK
Abbreviation
+
-
Abbreviation
+
-
Abbreviation
+12 V
GND
GND
+5 V
+3.3 V
Meaning
Ground
Switched power supply
Clock signal
Meaning
Ground
Switched power supply
Clock signal
Meaning
Plus pole
Minus pole
Meaning
Plus pole
Minus pole
Meaning
Power supply
Ground
Ground
Power supply
Power supply
Operating Instructions, Release 05/2006, A5E00362052-03
Input /Output
-
Output
Input
Input /Output
-
Output
Input
Input /Output
Input
-
Input /Output
Output
-
Input /Output
Output
–
–
Output
Output
SIMATIC Box PC 627