User's Guide

25
2. Use the total DC power consumption determined in Step 1 and the table below to determine the
number of the power units required.
200V AC Use
Total DC power
consumption (W)
Number of Power
Units required (for
N+1 redundancy)
No. of Power Units
required (for N+N
redundancy)
Notes
2250 W or less
2
2
Order the required number of Power Units
(no Power Unit is supplied with the standard
Enclosure).
4250 W or less
3
4
As above
6300 W or less
4
6
As above
8300 W or less
5
N+N redundancy
configuration not
supported
As above
10300 W or less
6
N+N redundancy
configuration not
supported
As above
As of 2008 September
100V AC Use
Total DC power
consumption (W)
Number of Power
Units required (for
N+1 redundancy)
No. of Power Units
required (for N+N
redundancy)
Notes
1800 W or less
3
4
Order the required number of Power Units
(no Power Unit is supplied with the standard
Enclosure).
2700 W or less
4
6
As above
3550 W or less
5
N+N redundancy
configuration not
supported
As above
4400 W or less
6
N+N redundancy
configuration not
supported
As above
As of 2008 September
IMPORTANT:
 If the total power consumption exceeds the specified limit, operation in AC duplex mode (N+N
redundant) is not supported. Instead, individual power redundant mode (N+1 redundant).
 Use the table above and the below expression to determine AC power consumption and apparent
power of the power units, and consider their capacity when installing them.
AC Power consumption (W) = Total DC power consumption (W) / 0.87 (200VAC)
= Total DC power consumption (W) / 0.83 (100VAC)