Siemens PC 670 SV connection for hard disk, Connection for CPU fan, Connection for device fan

Release 04/02 Hardware Information

SV connection for hard disk

The power supply of the 3.5” hard disk is effected via this connection.

Pin No.	Short Name	Description	Input / Output
1	P12V	+12 V	Output
2	GND	Chassis ground	–
3	GND	Chassis ground	–
4	P5V	+5 V	Output

Connection for CPU fan

The CPU fan is connected via this connection.

Pin No.	Short Name	Description	Input / Output
1	GND	Chassis ground	–
2	+12V	Switched power supply	Output
3	CPU FAN_CLK	Speed signal	Input

Connection for device fan

The device fan is connected via this connection.

Pin No.	Short Name	Description	Input / Output
1	+12V	Switched power supply	Output
2	GND	Chassis ground	–

Connection for buffer battery

The battery for the standby supply to the CMOS RAM is connected to this connection. The battery used is a 3.6 V lithium battery with a capacity of 750 mAh.

Pin No.	Short Name	Description	Input / Output
1	+12V	Switched power supply	Output
2	GND	Chassis ground	–

Panel PC 670 Computing Unit, Equipment Manual 7-31