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7-8 361834-002 Technical Reference Guide
Power and Signal Distribution
7.3 Powe r D is t ri b u ti o n
7.3.1 3.3/5/12 VDC Distribution
The power supply assembly includes a multi-connector cable assembly that routes +3.3 VDC, +5
VDC, +5 VDC STB, +12 VC, and -12 VDC to the system board as well as to the individual drive
assemblies. Figure 7-2 shows the power supply cabling for the Ultra Slim Desktop form factor.
NOTES:
Connectors not shown to scale.
All + and – values are VDC.
RTN = Return (signal ground)
sns = sense
GND = Power ground
RS = Remote sense
FO = Fan off
FSpd = Fan speed
FS = Fan Sink
FC = Fan Command
Vccp = +12 VDC for CPU
[1] This row represents pins 13 – 24 of connector P1.
Figure 7-2. USDT Power Cable Diagram
Conn Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9
Pin
10
Pin
11
Pin
12
P1 +5
aux
RTN + 5 +5 PS On RTN Pwr Gd +3.3 +3.3 Tach RTN Fan
P1 [1] +12 +5 sns RTN +5 +5 +3.3 RTN +3.3 sns +3.3 +3.3 RTN -12
P2 +3.3 RTN +5 RTN +12
P3 RTN RTN RTN VccP VccP +12
Power Supply
351455
P1
P2
P3
P1
13
1
12
P2
24
5
1
2
34
P3