138 Upgrade and Maintenance Manual TX2550 M4
6.1.1 PSU configurations
Figure 60: Example types of PSUs
I All different PSUs can be installed, removed or replaced in the same way.
6.1.2 Assembly rules
– Mixed assembly of PSUs from different power classes (e.g. class 1 or class
2) within a system is not supported.
– Mixing of Platinum and Titanium PSUs within same class (e.g. class 2) within
a system is not supported.
– Mixing of Platinum PSUs within same class and different manufacturer (e.g.
class 1) within a system is supported.
– Always install a dummy cover into an unused PSU bay to comply with
applicable EMC regulations and satisfy cooling requirements.
– For a redundant power supply configuration you need always two PSUs with
the same power class.
Power class Number in figure Power Item
1 1 450 W AC Platinum
2 2 800 W AC Platinum
3 3 800 W AC Titanium
4 5 1200 W AC Platinum
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