Compaq ProLiant 6000 Compaq ProLiant 6000 Power Management using Windows NT Pe - Page 13

Upply, Edundancy, Etermination

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422A/0697ECG WHITE PAPER (cont.) ... channel will show the impact of adding a component and whether an additional power supply will be necessary. TABLE 6 POWER SUPPLY (PS) REDUNDANCY DETERMINATION Channel a) 12V channel power ⇒ ⇒ and b) 5V channel power ⇒ ⇒ a) 12V channel power ⇒ ⇒ and b) 5V channel power ⇒ ⇒ a) 12V channel current ⇒ ⇒ and b) 5V channel current ⇒ ⇒ a) 12V channel current ⇒ ⇒ and b) 5V channel current ⇒ ⇒ Total Consumption PS 1 value + PS 2 value + PS 3 value Less than 245 watts +/- 2% Less than 163 watts +/- 3% ⇒ ⇒ Greater than 245 watts +/- 2% Greater than 163 watts +/- 3% ⇒ ⇒ Less than 20 amps +/- 2% Less than 32 amps +/- 3% ⇒ ⇒ Greater than 20 amps +/- 2% Greater than 32 amps +/- 3% ⇒ ⇒ # of PS's Needed for Redundancy 2 3 2 3 You can multiply the current by the voltage for each channel; the result will be the estimated increase in power consumption. The product of the multiplication can be added to the value for the appropriate channel power counter in the performance monitor. The example below predicts power consumption on a floppy drive that consumes .7 amps of current on the 5V channel when a typical load has been applied. Example 1: Calculations to predict power consumption on the 5V channel, values used are from Figure 3. 1. Calculate the total power being consumed on the specified channel PS(total) = PS1 + PS2 + PS3 PS(total) = 73.7 W + 76 W + 0 = 149.7 W 2. Calculate the power that will be used by the new component. Component Power Usage (W) = voltage (V) x current (A) Component Power Usage (W) = 5.1 V x .7 A = 3.57 W 3. Calculate the total power consumption after the component is added Power Usage after Component Addition = PS(total) + Component Power Usage Power Usage after Component Addition = 149.7 W + 3.57 W = 153.27 W 4. Compare the result to Table 6 Power Supply Redundancy Determination to see if it will be necessary to add another power supply for redundancy. 5V channel power is less than 163 watts. The power supplies will still be redundant after adding the floppy drive. 13

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W
HITE
P
APER
(cont.)
13
422A/0697ECG
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channel will show the impact of adding a component and whether an additional power supply will
be necessary.
T
ABLE
6
P
OWER
S
UPPLY
(PS) R
EDUNDANCY
D
ETERMINATION
Channel
Total Consumption
PS 1 value + PS 2 value + PS 3 value
# of PS’s Needed
for Redundancy
a)
12V channel power
and
b)
5V channel power
Less than 245 watts +/- 2%
Less than 163 watts +/- 3%
2
a)
12V channel power
and
b)
5V channel power
Greater than 245 watts +/- 2%
Greater than 163 watts +/- 3%
3
a)
12V channel current
and
b)
5V channel current
Less than 20 amps +/- 2%
Less than 32 amps +/- 3%
2
a)
12V channel current
and
b)
5V channel current
Greater than 20 amps +/- 2%
Greater than 32 amps +/- 3%
3
You can multiply the current by the voltage for each channel; the result will be the estimated
increase in power consumption.
The product of the multiplication can be added to the value for the
appropriate channel power counter in the performance monitor.
The example below predicts
power consumption on a floppy drive that consumes .7 amps of current on the 5V channel when a
typical load has been applied.
Example 1: Calculations to predict power consumption on the 5V channel, values used are from Figure 3.
1.
Calculate the total power being consumed on the specified channel
PS(total) = PS1 + PS2 + PS3
PS(total) = 73.7 W + 76 W + 0 = 149.7 W
2.
Calculate the power that will be used by the new component.
Component Power Usage (W) = voltage (V) x current (A)
Component Power Usage (W) = 5.1 V x .7 A = 3.57 W
3.
Calculate the total power consumption after the component is added
Power Usage after Component Addition = PS(total) + Component Power Usage
Power Usage after Component Addition = 149.7 W + 3.57 W = 153.27 W
4.
Compare the result to Table 6 Power Supply Redundancy Determination to see if it will be necessary to add another power supply
for redundancy.
5V channel power is less than 163 watts.
The power supplies will still be redundant after adding the floppy drive.