NEC Express5800/320Ma, Руководство по планированию, Страница: 45 / 80

Rack Configuration Planning 7-1
Chapter 7
Rack Configuration Planning
7-
For information about planning a rack configuration, see:
•
“Using PDUs” on page 7-1
•
“Determining PDU Requirements” on page 7-2
•
“Sample PDU Usage Calculation” on page 7-4
Using PDUs
Express5800/320Ma 3.2 GHz, 3.6 GHz, and Dual-Core systems have two power
receptacles. Correspondingly, two power distribution units (PDUs) provide power to the
receptacles.
Use of PDUs is optional unless you have a support agreement with NEC Solutions
(America), Inc. If you do have a support agreement with NEC Solutions (America), Inc.,
use pairs of PDUs to provide AC power to systems and components in a cabinet if six
or more power cords would otherwise exit from the cabinet.
The A-side (top) PDU provides power to:
•
The A-side of each system
•
A KVM switch
The B-side (bottom) PDU provides power to the other side of each system.
Because the A-side PDU always uses at least as many power cords and consumes at
least as much power as the B-side PDU, plan the cabinet configuration so that the
A-side PDU can support the configuration.