Compaq ProLiant BL e-Class System Overview and Planning

Compaq ProLiant BL e-Class System Overview and Planning 28
Non-Redundant PDU Example #1 (PDU P/N 207590-D72)
PDU (P/N 207590-D72) is a high-voltage PDU with a current rating of 24 A. The enclosure has a
maximum input current requirement of 5 A at 200 volts.
24 A (PDU current rating) / 5 A (enclosure total input current rating) = 4 enclosures per PDU
This PDU can support a maximum of four fully configured ProLiant BL e-Class enclosures in a
non-redundant configuration.
The selected PDU has four branch circuit breakers rated at 10 A each.
10 A (PDU branch current rating) / 5 A (enclosure total input current rating) = 2 per branch
2 enclosures per branch x 4 branches = 8 enclosures per PDU
This branch of the PDU can support a maximum of two fully configured enclosures in a
non-redundant configuration. This would suggest that eight enclosures (4 branches x 2 enclosures
per branch) could be supported. However, in this case, the more restricted rule is the first, which
allows only four enclosures per PDU.
Non-Redundant PDU Example #2 (PDU P/N 207590-D71)
PDU (PN 207590-D71) is a low-voltage PDU with a current rating of 24 A. The server has a total
input current rating of 10A at 100 volts.
24 A (PDU current rating) / 10 A (enclosure total input current rating) = 2 enclosures per PDU
This PDU can support a maximum of two enclosures at full server input current ratings in a non-
redundant configuration.
The PDU has with two branch circuit breakers rated at 15 A each.
15 A (PDU branch current rating) / 10 A (enclosure total input current rating) = 1 enclosure per
branch
One enclosures per branch x 2 branches = 2 enclosures per PDU
The PDU can support only one enclosure per branch. Since there are two branches, the PDU can
support a maximum of two enclosures. In this case, both restrictions allow a maximum of two
enclosures per PDU in a non-redundant configuration.
PDU Installation
Installing PDUs
PDU installation varies depending on the rack configuration, the number of ProLiant BL e-Class
server blade enclosures deployed in the rack, the selected type of PDU, the voltage and current
rating for each PDU.