2N Power Configuration; Dc Power Supplies - Oracle StorageTek SL3000 System Assurance Manual

DC Power Supplies

Limited support for T9840 and T10000 drives and no redundant TallBot support
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2N power configuration

Offers both AC and DC power redundancy
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Consists of two PDUs (per Base module or DEM) for AC redundancy, with a set of
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DC power supplies for each PDU
Provides N DC power supplies per PDU
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Requires two separate AC input sources per Base module or DEM
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Required for redundant TallBot and redundant electronics support
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2N+1 power configuration
Offers both AC and DC power redundancy with additional DC redundancy
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Consists of two PDUs (per Base module or DEM) for AC redundancy, with
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additional DC power supplies for each PDU
Provides N+1 DC power redundancy for each PDU (except the second PDU only
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has N DC power supply redundancy for the TallBot)
Requires two separate AC input sources per Base module or DEM
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Supports redundant TallBot and redundant electronics
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DC Power Supplies
There are two types of DC power supplies:
Load sharing 1200W DC — used for the robotics unit and tape drives
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200W cPCI — used for the electronics control module
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5-2 StorageTek SL3000 Systems Assurance Guide