Siemens SIMATIC 627B, Operating Instructions Manual

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Detailed descriptions
16.1 Motherboard
SIMATIC Box PC 627B
Operating Instructions, 06/2008, A5E00927393-02
163
Pin assignment of the supply for the power supply fan, X129
Pin no. Short description Meaning Input / output
1 GND Ground -
2 +12 V Switched voltage supply Output
3 PG1 FAN_CLK Clock signal Input
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. Short description Meaning Input / output
1 + Plus pole Input
2 - Minus pole -
Tap of the backup battery, X240, 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. Short description Meaning Input / output
1 + Plus pole Output
2 - Minus pole -
NOTICE
No battery should be connected to this connection.
Pin assignment of the supply for the serial ATA drives X25, X26, X27, X602
Pin no. Short description Meaning Input / output
1 +12 V Voltage supply Output
2 GND Ground –
3 GND Ground –
4 +5 V Voltage supply Output
5 +3.3 V Voltage supply Output