Redundant (4 + 4) Power Configuration; Figure 1-15 Standard Power Configuration (4 + 1) - Compaq RA8000 User Manual

RA8000 and ESA12000 Storage Subsystems
Figure 1–15 Standard Power Configuration (4 + 1)
1.8

Redundant (4 + 4) Power Configuration

A full redundant power configuration requires two separate power sources, two ac entry
power controllers, and eight shelf power supplies (Figure 1–16). Compaq recommends
this configuration to provide complete power system redundancy. Any one of the
following error conditions will cause the subsystem to cease operation:
•
Failure of five power supply SBBs
•
Failure of both ac power entry controllers
•
Failure of both ac power sources
•
Failure of both PDUs (ESA12000 only)
The primary ac source provides power to ac power entry controller A, which distributes
the ac power through the four black power cords to the four power supply SBBs on the
left end of each shelf.
1–26
Power
Controller A
387404-001
SHR-1153
EK–SMCPR–UG. A01