Siemens SIMATIC HMI IPC677C Operating Instructions Manual page 205

Pin assignment of the equipment fan, X132
Pin no.
1
2
3
Pin assignment of the supply for the power supply fan, X131
Pin no.
1
2
3
Connection for backup battery, X24, X240 (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, X2400 (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
Note
No battery should be connected to this connection.
Pin assignment of the supply for the serial ATA drives X26, X27, X28, X29, X30
Pin no.
1
2
3
4
5
SIMATIC HMI IPC677C
Operating Instructions, 04/2013, A5E02722710-04
Short description
GND
+12 V
CPU FAN_CLK
Short description
GND
+12 V
PG1 FAN_CLK
Short description
+
-
Short description
+
-
Short description
+12 V
GND
GND
+5 V
+3.3 V
Meaning
Ground
Switched voltage supply
Clock signal
Meaning
Ground
Switched voltage supply
Clock signal
Meaning
Plus pole
Minus pole
Meaning
Plus pole
Minus pole
Meaning
Voltage supply
Ground
Ground
Voltage supply
Voltage supply
Detailed descriptions
16.1 Motherboard
Input / Output
-
Output
Input
Input / Output
-
Output
Input
Input / Output
Input
-
Input / Output
Output
-
Input / Output
Output
–
–
Output
Output
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