Compaq ProLiant 6500 Compaq ProLiant 7000 Server Technology - Page 13

Redundant Processor Power Modules, Redundant Hot-Plug Power Supplies

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ECG078/0698 TECHNOLOGY BRIEF (cont.) ... Power Supplies Temperature Sensors System Boards Ambient Probe Power Supplies Processors Temperature Monitoring Circuitry OS Fan Control Logic ••--HRRHaereasdsrtdawrtawrehsehnuctdooowl n • - Graceful OS shutdown • - System alert • - Restart when cool •S-pSepeed up fans •S y System Fans Figure 8: Schematic diagram of fan control logic. Redundant Processor Power Modules Each processor in the ProLiant 7000 has its own redundant processor power module (PPM). PPMs are also known as voltage regulator modules. The PPMs deliver the precise voltage requirements of the processors. The core voltage for the 400-MHz Pentium II Xeon processor is 2.0 V and the voltage for the cache is 2.5 V. Compaq PPMs are programmable and support all current and future versions of Slot 2 processors. Each PPM module has redundant circuitry. If a failure occurs in one circuit of the module, the other circuit automatically takes over the task of regulating power to the processor. The ProLiant 7000 ships standard with one redundant PPM. An additional redundant PPM is available in each processor option kit. Redundant Hot-Plug Power Supplies The ProLiant 7000 uses one of the newest Compaq technologies to reduce downtime: intelligent, redundant, hot-plug power supplies. The server ships standard with two, dual-rated 750 W/500 W power supplies and supports three power supplies for an n+1 redundant configuration. The power supplies are connected to a separate power backplane in the server. Even if a power supply fails, its internal fans will continue to operate and help cool the server. The power supply has an embedded microcontroller and an Inter-Integrated Circuit (I2C) bus that communicates the status back to the system health drivers.3 The health drivers then send status information to the IMD and to Compaq Insight Manager. 3 For additional details about Compaq's intelligent power supplies, see the technology brief Intelligent Power Supply Technology, document number ECG016/0198. 13

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T
ECHNOLOGY
B
RIEF
(cont.)
13
ECG078/0698
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System Boards
Ambient Probe
Power Supplies
Processors
Power
Supplies
Temperature Monitoring
Circuitry
Fan Control Logic
System Fans
OS
- Hardware shutdown
- Restart when cool
- Graceful OS shutdown
- System alert
- Restart when cool
- Speed up fans
Figure 8: Schematic diagram of fan control logic.
Redundant Processor Power Modules
Each processor in the ProLiant 7000 has its own redundant processor power module (PPM).
PPMs are also known as voltage regulator modules. The PPMs deliver the precise voltage
requirements of the processors.
The core voltage for the 400-MHz Pentium II Xeon processor is
2.0 V and the voltage for the cache is 2.5 V.
Compaq PPMs are programmable and support all current and future versions of Slot 2 processors.
Each PPM module has redundant circuitry.
If a failure occurs in one circuit of the module, the
other circuit automatically takes over the task of regulating power to the processor.
The ProLiant 7000 ships standard with one redundant PPM.
An additional redundant PPM is
available in each processor option kit.
Redundant Hot-Plug Power Supplies
The ProLiant 7000 uses one of the newest Compaq technologies to reduce downtime: intelligent,
redundant, hot-plug power supplies.
The server ships standard with two, dual-rated 750 W/500
W power supplies and supports three power supplies for an n+1 redundant configuration.
The
power supplies are connected to a separate power backplane in the server.
Even if a power supply
fails, its internal fans will continue to operate and help cool the server.
The power supply has an embedded microcontroller and an Inter-Integrated Circuit (I
2
C) bus that
communicates the status back to the system health drivers.
3
The health drivers then send status
information to the IMD and to Compaq Insight Manager.
3
For additional details about Compaq’s intelligent power supplies, see the technology brief
Intelligent Power Supply Technology,
document number
ECG016/0198
.
Temperature Sensors