Power, Thermal, Acoustic; Power Supplies; Power Supply Specifications; Power Supply Connectors - Dell External OEMR R310 Technical Manual

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6 Power, Thermal, Acoustic

6.1

Power Supplies

The power supply subsystem consists of one or two AC/DC power supplies (1+1 redundant configuration)
connected to the planar through the power distribution board (PDB). The power supply only provides +12V
and +12Vaux. There are several voltage regulators in the system to supply different voltage levels needed by
different logic devices.
6.1.1

Power Supply Specifications

The standard R310 server system includes a single 350W (non-redundant) power supply. There is also an
option for a 400W (redundant) power supply. Either power supply configuration will provide power to the
R310 planar and the four internal hard drive bays. Power will be soft-switched, allowing power cycling
through a switch on the front of the system enclosure, or through software control (that is, server
management functions.) The power system is compatible with industry standards such as ACPI and Server
2000.
For a redundant power supply configuration, the second power supply provides hot-swappable power
redundancy. In redundant mode, the system distributes the power load across both power supplies to
maximize efficiency. When a power supply is removed with the system powered on, the full power load is
picked up by the remaining power supply. See
information.
Power supplies for the R310 do not have a FRU EEPROM. FRU data is stored in the memory of the PSU
Microcontroller. Additionally, the PSU Firmware can be updated by the iDRAC over the PMBus. If using only
one power supply, the single PSU should be installed in the PS1 bay and a PSU blank (metal cover) will be
installed in the PS2 bay. The use of the PS1 bay for the single PSU configuration is for consistency and to
ensure proper system cooling.
6.1.2

Power Supply Connectors

There are 2 separate power supply connectors on the planar: one connector is an ATX connector (2x12), the
other is a 2x2 connector to provide an additional two pins for +12V. (The connector pin definition is not ATX
standard and is defined by power rating calculation.)
The 2x12 connector provides 3.3V, 5V, 12V (P12VA) and 12V standby (P12V_AUX) to the system. (3.3V
standby to system is generated from 12V standby.)
The 2x2 connector provides 12V (P12VB) to CPU VRD 12V input.
Dell PowerEdge R310 Technical Guide
Power Supplies in the Hardware Owner's Manual for more
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