Office Friendly Server Cooling; Power; Data Center Server Power - HP Integrity rx2660 User's & Service Manual

Office Friendly Server Cooling

Six fans cool the Office Friendly server. The server fans have two rotors per fan. Four fans cool
the eight DIMMs and two processors. Two fans cool the hard-disk drives and the PCI riser board.
The fans cool three zones in the server. Fans 1 and 2 cool Zone 1, fans 3 and 4 cool Zone 2, and
fans 5 and 6 cool Zone 3. In the Office Friendly configuration, there is N+1 redundancy in Zone
1 and Zone 3 when one fan rotor fails. If a fan rotor fails in Zone 2, the server performs a soft
shutdown in 40 seconds, and the failed fan unit must be replaced. See
the Office Friendly fan locations and cooling zones.
The power supplies have built-in fans and are not controlled by the BMC.

Power

Figure 4 shows a block diagram of the power subsystem for the server, including voltage labels
for each main server subsystem that requires power.
Figure 4 Power Subsystem Block Diagram

Data Center Server Power

The Data Center server power sub system is designed to provide high availability with 1+1
redundancy. Two hot-swappable AC/DC power supplies generate 12 VDC for the system and
peripherals, and a housekeeping voltage (+3.3 V standby). One active power supply operating
at 100 VAC is sufficient to operate the system at its maximum load. Each power supply receives
AC power through integrated AC inlets. The system can operate at 100, or 240 VAC and achieve
1+1 redundancy. The power supplies are power factor corrected and the maximum DC power
output of each power supply is 900 watts at 120 VAC, and 1000 watts at 240 VAC.
24 Overview
Figure 44 (page 147) for