
CONFIGURATION GUIDE – NEC Express5800/A2040b, A2020b, A2010b, A1040b
NEC Corporation Revision 8.0 – April 2015
7 Other Add-in Components
7.1 Power Supply Unit
7.1.1 Number of Power Supply Unit
See the table below for the required number of Power Supply Unit per voltage/configuration/redundancy.
Number of Power Supply Unit
NOTE:
When selecting Power Supply Unit, recommend to consider potential add-on of the optional products in
the future.
Redundancy can be selectable; no-redundancy, N+1 and 2N:
・N+1: When one Power Supply Unit fails, the operation can continue.
・2N: Configuring 2 power supply groups, each consisting of 1 or 2 power supply unit. When one group
fails, the operation can continue with another group. In this case, power supply is redundant between
PSU#1 and PSU#2, or PSU#3 and #4. Please configure power supply path appropriately.
Hot-plug supported. Can replace Power Supply Unit without stopping the system (under redundant
configuration securing enough power during replacement).
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