Internal Chassis Features; Power Subsystem - Intel SR870BN4 - Server Platform - 0 MB RAM Product Manual

Internal Chassis Features

Power Subsystem

WARNING
Only qualified technical personnel should access the processor, memory,
and non-hot-plug I/O subsystem areas while the system is energized as
some exposed circuits exceed 240 VA and may cause burn injury if
accidentally contacted.
The power subsystem can be configured as following:
Two power supply modules installed, (1+1) redundancy at 220 VAC
One power supply module installed, non-redundant at 220 VAC only
Two power supply modules installed, non-redundant for 120 VAC
The power subsystem consists of the following:
Power supply modules
Plug-in DC-to-DC converters
Power pods (located adjacent to the processors on processor board)
The power distribution board
Power Supply Modules
The power supply modules are Server System Infrastructure (SSI) compliant, universal AC input
with Power Factor Correction (PFC) Distributed Power Supplies (DPS). The power supply
modules are rated at 1200 W over an input range of 180-264 VAC, and at 700 W over an input
range of 90-132 VAC.
One power supply module connected to 220 VAC is capable of handling the worst-case power
requirements for a fully configured system: four processors, 32 GB of memory, eight PCI add-in
cards, three hard disk drives, a DVD or CD drive, and an LS-240 drive.
The power supply has two DC outputs: 48 V (main) and 12 V (standby). The 48 V main power is
distributed throughout the server and is converted locally at point-of-load using either embedded or
plug-in DC-to-DC converters.
In an N+1 configuration the 48 VDC outputs have active (forced) current sharing and 12 VDCSB
outputs have passive current sharing.
The two externally enabled outputs have the following ratings:
+48 VDC at: 24.0 A @HI line /13.5 A @LO line
+12 VDCSB at: 4 A @any line
Intel® SR870BN4 Server System Product Guide 31