Dell PowerEdge 4820 Technical Manual - Page 23

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Power solutions

Dell provides the ideal PDU and UPS systems to protect and support Enterprise applications. With

three- year warranties and Dell's world class support and reliability, the extensive portfolio of Dell

PDUs and UPSs can be mixed and matched to create the right combination for your data center

needs.

Power distribution unit

A PDU (power distribution unit) distributes power from a single input to multiple outlet receptacles.

Reliable power distribution is a key component of every data center. The Dell PDU portfolio

provides reliable power distribution in a rack enclosure from low amperage single phase circuits to

higher- power 3- phase solutions. The Dell power distribution portfolio includes basic, metered, and

managed functions, input voltages from 100 volts to 415 volts, input currents from 16 amps to 60

amps, and varying quantities of outlet types, up to 48 receptacles. In addition to the amperage

rating, Dell specifies the true measure of power consumption for the PDU in kilowatt- hours (kWH).

The Dell family of PDUs combines worldwide standard IEC power outlet connections with

regionalized input options allowing flexibility across a variety of global power infrastructures.

Detachable inlet cords on some models facilitate a wide selection of deployment options.

Dell PDUs come in several form factors. One and zero rack unit (1U/0U) PDU models can be placed

in a 1U rack space with other rack- mount equipment or in the side of some racks. Dell also offers

vertical PDUs in half- height length for all Dell racks, full- height for 42U/48U racks, and extended-

height for 48U racks, providing the flexibility to select the right PDU for the equipment in the rack.

The vertical PDUs can be installed without tools utilizing button mounting in the rear trays of the

Dell racks, with the outlets facing toward the center of the rack, or turned 90 degrees to direct the

outlets toward the back of the rack to help with cord management.

The 42U and 48U high- density vertical PDUs include a greater number of highly packed outlet

receptacles, in both basic and metered versions. These are ideal for larger deployments that will

maximize the amount of equipment installed in a rack. For example, one high- density PDU could

handle all of the power supplies in multiple blade server systems installed in one rack.

Dell Metered and Managed PDUs simplify the deployment of advanced power metering and

environmental monitoring in the data center. Real- time remote monitoring of connected loads

prevents potential overloads. User- defined alarms can warn of potential circuit overloads before

critical IT failures occur. Data logging can provide load metering and report power utilization trends,

enabling data center managers to make informed decisions on right- sizing IT environments to lower

the total cost of ownership. Users can access and configure the Dell Metered or Managed PDU with

embedded firmware through secure Web, SNMP, or Telnet interfaces, and also leverage the Dell

Management Console (DMC), which provides IT administrators a consolidated view of their

infrastructure.

Optional cord retention kits help to manage the power cords plugged into the PDU. Other

accessories for the Dell Metered and Managed PDUs include temperature, temperature/humidity,

and dry contact sensors. The dry contact port can be used for user- defined sensors, such as rack

door position, motion, light detector, and proximity sensors.

Dell PDUs are specified for a higher operating temperature of 50° Celsius (122° Fahrenheit), which is

especially important for the warmer environment in the back of the rack. The PDUs also come with

a full three- year warranty.

PowerEdge Rack Enclosures Technical Guide