User Service Guide, Fifth Edition - HP Integrity rx8640 SEU

Figure 3-22 Power Cord Receptacle Configuration
Power cord receptacles are identified using a label at the rear side of the chassis indicating which
receptacle is B0 and which receptacle is A0.
The SEU follows the power configuration that is selected for the server. So, if grid A0 & B0 are
selected for the server, the SEU needs to have both power cords connected. Otherwise, power
fault messages are logged. You cannot select one power configuration for the SEU and another
power configuration for the server.
NOTE: If only one power cord receptacle is used, always plug the power cord into A0.
If two separate power sources are available, the two power supplies can be plugged into the
separate power sources, increasing system reliability should one power source fail.
The AC input for power receptacle A0 connects to both BPS 0 and BPS 1. The AC input for power
receptacle B0 connects to both BPS 0 and BPS 1. Refer to Figure 3-23 for details.
Cabling and Power Up 61