Mellanox Technologies MSX6512-4R, Руководство пользователя по оборудованию

Страница: 16 / 129

InfiniBand FDR Switch Platform Hardware User Manual
Mellanox Technologies 16
1.4.1 1000W Power Supply Units
The 1000W power supply units (PSUs) deliver 1000W at 48V. The AC source to each
PSU must be able to provide 1176.5W in order to output 1000W in DC.
With 1000W PSUs the only redundancy option is N+1. In this configuration 1PSU can
be extracted without bringing down the system. When using the 1000W PSUs, the mini-
mum complement of PSUs at start-up is 4 and the chassis will continue to run at full
capacity with only 3 PSUs.
1.4.2 1600W Power Supply Units
The 1600W power supply units (PSUs) deliver 1600W at 48V. The AC source to each
PSU must be able to provide 1882.4W in order to output 1600W in DC.
When using the 1600W PSUs, the minimum complement of PSUs which allows the
chassis to run at full capacity is 2.
The 1600W PSUs can implement the following two redundancy options:
• No redundancy (combined mode)
• N+1 configuration (ps-redundant mode)
When supplied from a single 220V power grid, the chassis supports up to 2 redundant units.
Thereby, the minimum required number of PSUs equals 2. When supplied by a single 110V
power grid, the number of redundant power supplies is only 1.
• N+N configuration (grid-redundant mode)
The chassis PSUs are fed from two power grids for high availability. The second power grid
can be supplied by any of the following:
• a backup power supply grid
• a generator
• a battery backup system
• any combination of the above
Connecting 2 power supplies to one power supply grid and the remaining 2 power supplies to
a secondary power supply grid will create N+N redundancy. This is High Availability. Under
these conditions should a power grid fail (an electric company power failure or blackout for
example) power grid High Availability will continue to keep the chassis running at full capac-
ity through the secondary or backup power supply grid.
With N+N optional PSU grid redundancy the chassis can run on 1/2 of the full complement of
PSUs. N+N allows the chassis to run on 2 PSUs supplied from one power grid while 2 are
connected to a second power grid.
N+N redundancy ONLY works with a supply voltage of 220V.
With power grid A charged with current and power grid B not charged there is only
grid redundancy and not PSU redundancy.