Sff/Cmt Power Distribution - HP Compaq Elite 8000 CMT Technical Reference Manual

Power and Signal Distribution
Table 7-1 lists the specifications of the external supply.
USDT 135-Watt Power Supply Unit Specifications
Parameter
Input Line Voltage Range
Line Frequency
Input Current, Maximum load @ 90 VAC
Output Voltage
Output Current, nominal load
Output Current, maximum load
Output Current, peak load (300 ms max) [1]
NOTES:
Total continuous power should not exceed 135 watts. Total surge power (<10 seconds w/duty cycle < 5 %) should not exceed
170 watts.
[1] Using 100 VAC input. The output voltage is allowed to drop to a minimum of 15 VDC during the transient period.
7.3

SFF/CMT Power Distribution

The SFF and CMT form factors use a common power source power supply unit contained within
the system chassis. Figure 7-2 shows the block diagram for power generation in the SFF and
CMT.
Front Bezel
Power Button
Power On
90 - 264 VAC
NOTE: Return (RTN or ground) not shown.
Conn Pin 1
P1
P2 FANcmd
P3
NOTES:
Connectors not shown to scale.
–
All + and
RTN = Return (signal ground)
Figure 7-2. SFF/CMT Power Distribution and Cabling, Block Diagram
7-2
Table 7-1.
Power Control Logic, DC/DC Converter
& Voltage Regulators
P1
+12 Vmain +12 Vsb
Pin 2 Pin 3
–
RTN RTN 12 V
Fan Speed PS On
RTN RTN +12 Vcpu
values are VDC.
90–265 VAC
47–63 Hz
2.4 A
19.5 VDC
3.5 A
6.9 A
9.0 A
System Board
P2
PS Fan
Fan
-12 V
On
Cmd Spd
Power Supply Unit
Pin 4 Pin 5
+12 Vmain +12 Vmain
Pwr Good RTN
+12 Vcpu
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3
1
P3
Pwr
+12 Vcpu
Good
6 5
4
1
Pin 6
+12 Vsb
RTN
Technical Reference Guide
P3
4
2
P2
4 3 2 1
P1
6
3