Spu Cabinet Internal Layout - HP 3000 99x Family Installation Manual

SPU Cabinet Internal Layout

The SPU cabinet contains the processor cards, memory cards, bus converter cards, I/O
cards, the power supply system, and the cooling fan assembly (see Figure 1-2 and Figure
1-3).
At the top front of the cabinet is the control panel, with various switches and indicators.
The top half of the cabinet contains:
Processor Memory Bus (PMB) card cages. There is a front PMB card cage and a rear
PMB card cage. The PMB card cages contain processor cards, memory cards, bus
converter cards, and a service processor (SP) card.
DC-to-DC power modules for memory, BC cards, processors, and fans.
Miscellaneous Power Module (MPM) for the Service Processor.
In the middle of the cabinet is the cooling fan tray.
The bottom half of the cabinet contains:
HP-PB card cage. This card cage accepts HP-PB I/O cards.
AC-to-DC power module (PFC unit).
AC Front End (ACFE) with the circuit breaker switch.
Battery Back-up Unit (BBU) for 890, 990, and 992 only.
Chapter 1
Introduction
Orientation
1-9