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Abstract
The HP BladeSystem p-Class1U power enclosure provides hot-plug, redundant power for a single
enclosure of HP ProLiant BL p-Class server blades from standard single-phase AC inputs. A properly
configured HP BladeSystem p-Class 1U power enclosure is an ideal power solution for small office
and remote site blade deployments. This technology brief explains the 1U power enclosure operation
and features as well as infrastructure configuration considerations. This paper is written with the
assumption that readers are already familiar with the HP BladeSystem.
Introduction
The HP BladeSystem consists of modular components that enable IT administrators to readily modify
and scale their infrastructures to meet changing IT demands. The ability to provide required power to
servers and use it efficiently is a critical IT need. The HP BladeSystem includes two power subsystem
options: a 3U power subsystem and a 1U power subsystem. This paper describes the 1U power
subsystem only. Refer to
www.hp.com/go/bladesystem for information about the 3U power
subsystem.
The 1U power subsystem includes an HP BladeSystem p-Class 1U power enclosure configured with
embedded power supplies and a power management module. Power supply and AC line cord
redundancy is provided when powering one fully configured HP BladeSystem p-Class server blade
enclosure. The power management module enables IT administrators to efficiently monitor and
manage total enclosure power consumption.
Choosing an optimal power solution requires the consideration of many factors, including the number
of server enclosures needed, the type of server blades to be installed, and the type of available
power. The HP BladeSystem p-Class 1U power enclosure is particularly well suited to the following IT
environments:
• Small or mid-size businesses using server blades in their infrastructure
• Remote or branch offices with distributed server blade deployments
• IT environments with single-phase power requirements
Components of the enclosure
The HP BladeSystem 1U power enclosure supports high availability by providing hot-plug, redundant
power supplies; redundant AC inputs; and a hot-plug power management module that operates
independently of the server blades and interconnects.
Hot-plug, redundant power supplies
The 1U power enclosure houses up to six hot-plug power supplies, each unit rated at 2,000 W DC
output power. The enclosed six power supply bays are divided into two sides with three bays on bus
A and three bays on bus B (Figure 1 and Table 1).
