Seagate ST373455LC - Cheetah 73.4 GB Hard Drive Installation Manual page 37

Barracuda 18LP Installation Guide, Rev. B
Figure 5. DC power connector
Abbildung 5. Gleichstromanschluß
Note. Signal ground on the power control board (PCB) and the
head and disc assembly (HDA) are connected together in
this drive and you cannot separate them. The equipment
in which you have mounted the drive is connected
directly to the HDA and PCB without electrically isolating
shock mounts. Maximizing the conductive contact area
between HDA ground and system ground may reduce
radiated emissions.
If you do not want the system chassis to be connected to
the HDA/PCB ground, you must provide a nonconductive
J1 J1-Auxiliary
Pin 1 Pin 1A
J1-DC Power
4P 3P 2P 1P
PCB
Pin
1
2
3
4
Pin Gleichstrom
1 +12V
2 +12V Rückleitung
3 + 5V Rückleitung
4 + 5V
Power
Cable
35
Power
+12V
+12V ret
+ 5V ret
+ 5V