HP Xw25p HP BladeSystem p-Class System Overview and Planning - Page 27

HP BladeSystem p-Class power subsystem HP provides two power subsystem alternatives to accommodate various environments and customer needs. These two options are enclosure-based power and rack-centralized power. All server blades, interconnect options, and management tools are fully compatible with either power subsystem. Enclosure-based power The new HP BladeSystem p-Class 1U Power Enclosure provides hot-plug, fully redundant power for a single server blade enclosure containing any mix of server blades and interconnects. This option is ideal for small blade deployments such as in remote or branch offices or small and mid-size businesses. Figure 21. HP BladeSystem 1U Power Enclosure Rack-centralized power The HP BladeSystem p-Class 3U power subsystem provides hot-plug, fully redundant power for multiple enclosures that would typically be deployed in racks in a datacenter environment. Rack-centralized power provides an efficient way to support a large number of blades while eliminating power cables and the clutter and cost of PDUs associated with traditional power schemes. The 3U rack-centralized power subsystem includes the power supplies, 3U power enclosure, and a power distribution option. The HP BladeSystem p-Class system can be powered from single-phase or three-phase AC power or from -48 VDC power sources. Power supplies The power supplies for the 3U solution convert 200-240 VAC to -48 VDC to power server blades and interconnect switches and are housed in a 3U power enclosure. The power supplies are front-accessible, hot-pluggable, and can be configured redundantly. The power enclosures are rackmounted below the server blade enclosures that they support. 27