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Appendix F. BladeCenter
®
power module upgrade guidelines 531
Important: If the sum of the power unit values in power domain A is greater than the capacity of the
installed power modules, power domain A has nonredundant power. Complete the following steps:
a. Determine whether rearranging the installed devices between power domain A and power domain B
in the BladeCenter unit will sufficiently reduce the power requirements for the power domain (use
the power worksheets on page 532).
b. If rearranging the installed devices does not sufficiently reduce the power requirements, the power
modules must be upgraded to maintain redundancy. Install the 1200 W to 1400 W Power Supply
Upgrade Kit (part number 90P0197) on the power modules to attain 1400 W, install the 1800 W Power
Supply Module option (part number 13N0570) to attain 1800 W, or install the 2000 W Power Supply
Module option (part number 26K4816) to attain 2000 W. Go to
http://www.ibm.com/servers/eserver/serverproven/compat/us/ for information about ordering
these options.
5. To maintain full power redundancy in power domain B, make sure that the power modules in bays 1 and
2 are connected to different 200 - 240 volt ac power sources and meet the requirements in the following
table:
Important: If the sum of the power unit values in power domain B is greater than the capacity of the
installed power modules, power domain B has nonredundant power. Complete the following steps:
a. Determine whether rearranging the installed devices between power domain A and power domain B
in the BladeCenter unit will sufficiently reduce the power requirements for the power domain (use
the power worksheets on page 532).
b. If rearranging the installed devices does not sufficiently reduce the power requirements, the power
modules must be upgraded to maintain redundancy. Install the 1200 W to 1400 W Power Supply
Upgrade Kit (part number 90P0197) on the power modules to attain 1400 W, install the 1800 W Power
Supply Module option (part number 13N0570) to attain 1800 W, or install the 2000 W Power Supply
Module option (part number 26K4816) to attain 2000 W. Go to
http://www.ibm.com/servers/eserver/serverproven/compat/us/ for information about ordering
these options.
Statement 13:
Table 158. Power domain A minimum power requirements
Sum of IBM power units for blade servers in Power domain A Minimum power module required
Less than 7.4 1200 W (labeled 7.5A)
Greater than or equal to 7.4 and less than 9.0 1400 W (labeled 9A)
Greater than or equal to 9.0 and less than 10.0 1800 W (labeled 12A)
Greater than or equal to 10.0 2000 W (labeled 13.5A)
Table 159. Power domain B minimum power requirements
Sum of IBM power units for blade servers in Power domain B Minimum power module required
Less than 9.9 1200 W (labeled 7.5A)
Greater than or equal to 9.9 and less than 11.5 1400 W (labeled 9A)
Greater than or equal to 11.5 and less than 13.4 1800 W (labeled 12A)
Greater than or equal to 13.4 2000 W (labeled 13.5A)