User guide

C–6 Rack information
Hitachi Unified Storage VM Block Module Hardware User Guide
Maximum current load. When connecting devices to the PDUs, do not
exceed 12 amps per bank of four receptacles, and do not exceed 24 amps
per PDU. Follow the guidelines for PDU load as specified in the appropriate
Hitachi Data Systems installation documentation.
To ensure maximum system availability, each PDU requires a dedicated 30A
circuit. For example, a system with four PDUs, each with a 30A L630P plug,
requires four 30A circuits.
Before installing third-party components in the rack, determine the current
draw of each component and compare that with the allowable current load
on each PDU to determine if the component can be plugged into a PDU.
To reduce the risk of injury, fire, or damage to persons or equipment, do not
exceed the maximum usable amperage per PDU. Consult the electrical
authority having jurisdiction over your facility's wiring and installation
requirements. When planning for power distribution and requirements for
your rack configuration, note the following:
• Balance the current load between available PDUs.
• The current load on each PDU must not exceed 80% of the PDU current
rating (that is, the maximum amperage is 80% of the 30 amp PDUs,
allowing for a maximum of 24 usable amps per PDU).
If an uninterruptable power supply (UPS) is used, the load should not
exceed 80% of the UPS devices marked electrical current rating.
PDU specifications
The following illustration shows the Hitachi rack PDU that is used in the
Hitachi Data Systems Solutions rack. The tables following the illustration
provide the specifications of the PDU used in the rack.
Table C-3: PDU specifications
Figure C-3: Hitachi rack PDU
Product Code Description
Usable in Solutions
rack?
Americas Americas region
PDU-121112F10
(sourced by CTI)
12 outlet, 30A, 208V, single phase,
L6-30P connector, 10-foot power cable
Yes
PDU-221112F10
(sourced by CTI)
22 outlet, 30A, 208V, single phase,
L6-30P connector, 10-foot power cable
Default