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Appendix B Components B-41
B.23 PSU Backplane
The PSU backplane (PSUBP) is a PCB that has a connector for interconnecting multiple
power supply units (PSU) concurrently operated. There are two types of PSUBP, namely the
PSUBP_A commonly used for all server and the PSUBP_B for the M8000 only.
The PSUBP is shown in
FIGURE B-35 and FIGURE B-36.
FIGURE B-35 PSU Backplane (PSUBP_A)
FIGURE B-36 PSU Backplane (PSUBP_B)
The PSUBP has the following characteristics.
■ Because the PSUBP is a built-in unit in the cabinet, only cold replacement is available for
the PSUBP.
■ The PSUBP connects the output of PSU to each unit through system backplane (BP_A or
BP_B).
■ The PUSBP_A allows connection to up to five PSUs.
■ The PUSBP_B enables connection to up to four PSUs.
■ The PSUBP has a label bearing the printed component number and manufacture's serial
number.