User Service Guide, Fifth Edition - HP Integrity rx8640 SEU

The PCI on-line replacement (OLR) fan modules are located in front of the PCI cards. These six
fans are housed in plastic carriers. They are configured in two rows of three fans.
Four OLR system fan modules, externally attached to the chassis, are 120-mm (4.7-inch) fans.
Two fans are mounted on the front surface of the chassis and two are mounted on the rear
surface.A cable harness that connects from the rear of the BPSs to the system backplane provides
DC power distribution.
The mass storage backplane obtains power from a cable connected to the PCI backplane.
Figure 1-6 Right-Rear View of the SEU
The PCI I/O card section, located toward the rear, is accessed by removing the top cover.
The core I/O cards are positioned horizontally at the rear of the chassis. One core I/O card is
positioned directly above or below the other core I/O card. The SEU ships with both core I/O
cards installed in the chassis.
The PCI card bulkhead connectors are located in the top rear portion of the chassis.
Access to the system backplane is accomplished by removing the left side cover. The system
backplane inserts by a guide or insertion mechanism using a single large jack screw assembly.
Redundant line cords attach to the AC connector module at the bottom rear. One 20-amp cord
is required to supply power to the SEU. One additional line cord provides power source
redundancy.
Four OLR system fan modules, externally attached to the chassis, are 120-mm (4.7-inch) fans.
Two fans are mounted on the front surface of the chassis and two are mounted on the rear surface.
All manageability communications use the main cable assembly between the SEU and the server.
26 Server Expansion Unit Overview