7-8
361834-002
Technical Reference Guide
Power and Signal Distribution
7.3 Power
Distribution
7.3.1 3.3/5/12 VDC Distribution
The power supply assembly includes a multi-connector cable assembly that 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
3
4
P3
Содержание Compaq dc71 Series
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