HP Carrier-grade cc3300 User Information and Service Guide - HP Carrier-Grade - Page 31
Power Supplies, DC Power Subsystem
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Power Supplies The power supply cage shown in Figure 3-3 is accessed from the rear of the chassis. The power supply cage supports up to two hot-swap power supplies (either AC input or DC input) in a (1+1) redundant configuration. A power supply filler module (shown in Figure 3-3) for the empty power supply site is supplied for servers without redundancy. Only the DC input version is NEBS certified. Figure 3-3. Non-redundant AC-Power Supply Subsystem (Filler Module Shown) DC Power Subsystem This section defines the features of the DC input switching power subsystem. Features • 450-Watt output capability in full DC input voltage range • Power Good indication LEDs • Internal cooling fans with multi-speed capability • Remote sense of 3.3-Volt, 5-Volt, and 12-Volt DC outputs • DC_OK circuitry for brown-out protection and recovery • Built-in load sharing capability • Built-in overloading protection capability • Onboard Field Replaceable Unit (FRU) information • I2C interface for server management functions • Integral handle for insertion/extraction Introduction The DC version of the server uses a -48 to -60 VDC input switching power subsystem, which provides up to 450 Watts with -48 to -60 VDC input and with current and remote sense regulation. The power subsystem consists of one or two 450-Watt power supply modules. A server with two modules forms a redundant, hotswappable (1+1) power subsystem. Chapter 4 31