Mellanox Technologies Switch-IB, User Manual

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Installation
61 Mellanox Technologies
2.7.1 Power Supply Units
The power supplies deliver 2500W at 48V
DC
. The input to each of these power supplies requires
12A current in order to output 2500W.
For N+N configuration up to half of the PSUs can go down and the system will continue to run.
The power required to run the switch system is equally divided between all of the working PSUs.
2.7.1.1 Extracting and Inserting the PSU
With all of the N+N 2500W power supplies installed, the system is in N +N redundant configura-
tion, half of the PSUs may be extracted without bringing down the system.

To extract a PSU:
Step 1.
Determine which AC connector on the connector side of the chassis corresponds to the
defective PSU.
Step 2.
Remove the power cord from the PSU’s inlet. Note which power cord it is according to the
AC numbering.
Figure 44: Power Unit AC Inlet Numbering
Step 3.
On the spine side of the chassis, remove the cover to the PSUs. There are four Phillips head
screws for the cover plate.
Figure 45: Power Supply Unit
Han-
Latch
Step 4.
Grasping the handle with one hand, push the black latch release while pulling the handle
outward. As the PSU unseats, the PSU status indicators will turn off.
Step 5.
Remove the PSU.

To insert a power supply unit:
A new system would have the PSU already installed so there