User guide

83
The number of power units required is determined by the total power consumption of blades. See
the following to determine the number of power units required for your system.
*If you need more detailed information, please contact your sales agent.
1. Calculate the total power consumption according to the following formula:
Total power consumption (watt) = total power consumption of blades (watt) + 1340 (watt) (power
consumption of the blade enclosure*)
*The power consumption of the blade enclosure includes power consumption of switch modules, fan units, etc.
To find the total power consumption of the blades, add up the power consumption of all the blades installed on the
blade enclosure. The amount of power consumption varies according to the blade type. For information on the power
consumption of blades, see the User's Guides or Configuration Guides of the blades.
2. Determine the number of power units required by using the value for total power consumption
quoted by the formula above.
Total power
consumption (watt)
Number of power
units required
(N+1 redundancy
mode）
Number of power
units required
(N+N redundancy
mode）
Remarks
2250 or smaller
2
2
The number of power units required
include the two power units that are
installed as standard.
4500 or smaller
3
4
6750 or smaller
4
6
9000 or smaller
5
Not available
As of 2008 April
Important
The N+N redundant mode cannot be used if the total amount of power consumption
is over 6750 watts. Use the N+1 redundant mode instead.
Power unit installation guide