DC Power Supplies

The DC power supplies provide power for the tape drives and robot These supplies are located in the Base and Drive Modules.

To determine the number of power supplies to order, see Calculate Power Supply Quantities.

Power Supply Locations

1. Rail DC power supplies (1200W DC)
2. DC power converters
3. PDUs (240 VAC)
4. Drive DC power supplies (1200W DC)

Base Card Cage DC Power Converters

The DC converters in the card cage convert 48VDC from the drive DC power supplies to 12VDC. The converters replace the functionality of the cPCI power supplies in the SL3000. Each Base Module ships standard with two DC converters.

A minimum card cage configuration (one controller, one root switch, three storage cards, one video card, and one fan assemblies) requires a minimum of two DC converters for N+1 and three for 2N or 2N+1 redundancy.

A maximum card cage configuration (four controllers, two root switches, seven storage cards, one video card, and two fan assemblies) requires a minimum of three DC converters for N+1 and four for 2N or 2N+1 redundancy.

Rail Power Supplies

The robots use load-sharing 1200 W DC power supplies located at the top of the Base Module (the Drive Module does not contain rail DC supplies).

The rail DC power supply are physically the same power supply used for the drives. Each Base Module ships standard with two rail DC power supplies used for N+1 and 2N configurations. You must order a third DC power supply for the 2N+1 configuration.

Tape Drive Power Supplies

The drives use load-sharing 1200 W DC power supplies. Up to four power supplies are located to the left of each PDU in both the Base and the Drive Module.

The library ships standard with two drive power supplies per Base and two per Drive Module. The number of additional power supplies required depends on the library configuration.