86 Upgrade and Maintenance Manual BX900 S2
Power supply
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6.1 Basic information
The BX900 S2 system unit has 6 bays for hot-plug PSUs (PSU 1-6). There are
two types of PSUs available, standard PSU and High Efficiency PSU
(hereinafter referred to as HE PSU), see the "PRIMERGY BX900 S2 Blade
Server System Unit Operating Manual".
I The information in this section applies to both standard PSUs and high
efficiency PSUs.
6.1.1 Power supply redundancy
Figure 13: Numbering of the PSU bays
In the minimum configuration, bays PSU 2, PSU 3 and PSU 6 are fitted with
PSUs. The remaining bays are free.
Depending on the system unit configuration, the remaining bays must be fitted
with further PSUs or with fan modules. Make sure you observe the following
order: PSU 5 – PSU 1 – PSU 4. The required number of PSUs and fan modules
PSU 1 PSU 2 PSU 3
PSU 4 PSU 5 PSU 6
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