HP Integrity rx6600 Server User Service Guide

Figure 4 Fan Units
The server has the following cooling components:
• Thermal sensor in the front panel [0xd8] that measures inlet ambient air temperature.
• Up to four dual processors each with its own thermal register [0xd9, 0xda], measuring internal
die temperature.
• Intrusion sensor, located on the common display pca, and held in contact mode by the top
cover.
• Power supplies, each with its own pair of fans running at full speed and its own (virtual) health
sensor [0x40, 0x41].
• Fan units 1 through 6 consisting of 2 individual fans rotors [0xe0 to 0xe9].
Power
The server power subsystem is designed to provide high availability with 1+1 power supply
redundancy. Figure 5 (page 25) is a block diagram of the power subsystem, including voltage
labels for each main server subsystem that requires power.
24 Overview