Emergency Power Control; Power Distribution Units; Power Cord Connections; Redundant Power - HP 3PAR StoreServ 7450c Planning Manual

labeled to identify the branch circuit it is controlling. The receptacle should also be labeled. Plan
on a circuit breaker maximum of 30 A per PDU (de-rated to 24 A).

Emergency Power Control

As a safety precaution, you might consider providing emergency power-off controls for disconnecting
the main service wiring that supplies storage systems. Install these controls at a convenient place
for the operators and next to the main exit doors of the room after checking local electrical codes
for further guidelines.

Power Distribution Units

In HP-integrated storage systems, four PDUs are mounted horizontally below the enclosures at the
bottom rear of the rack. Numbers for PDUs are assigned beginning with 0, from bottom to top.
NOTE: If a storage system rack does not have components installed in the top portion of the rack,
do not connect and use the two upper PDUs (PDU 2 and PDU 3) to power the system. Redundant
power is still supplied to the lower bays in the rack through PDU 0 and PDU 1.
Storage system PDUs are equipped with NEMA® L6–30 or IEC 60309 connectors, depending on
the region. International PDUs are equipped with IEC 60309, 2P+E (3 wire, 2 Pole + Earth Ground)
connectors. The appropriate receptacles or adapters are necessary at the operating site to
accommodate these connectors.
Each PDU is equipped with two power banks and separate circuit breakers, used exclusively for
storage system components.
WARNING!
of data, do not use the surplus power outlets in the storage system PDUs. Never use outlets in the
PDUs to power components that do not belong to the storage system or to power storage system
components that reside in other racks.

Power Cord Connections

Storage systems arrive with all internal power cords configured. Each PDU AC cord connects to
the wall outlet and supplies power to the node and drive enclosure power supplies. The power
can be routed from the top or bottom of the rack.

Redundant Power

The storage system supports redundant power through the use of PDUs and PCMs.
WARNING!
of data, do not use the surplus power outlets in the storage system PDUs. Never use outlets in the
PDUs to power components that do not belong to the storage system or to power storage system
components that reside in other racks.
To support redundant power:
The PCMs in each enclosure must connect to separate PDUs.
Each PDU in the system must connect to an independent AC circuit.

Power Cooling Modules

The storage system includes an enclosure that has two PCMs, an integrated power supply, and a
cooling fan and battery, that are located at the rear of the system on either side of an enclosure.
The PCM converts current from an AC line to appropriate DC levels and supplies power to the
controller node.
To avoid possible injury, damage to storage system equipment, and potential loss
To avoid possible injury, damage to storage system equipment, and potential loss
Emergency Power Control 23