Installing and Removing an AC Power Supply
Enterasys S-Series S4 Chassis Hardware Installation Guide 3-13
Installing and Removing an AC Power Supply
S-AC-PS and S-AC-PS-15A power supplies provide two power output levels relative to the input
power source.
• S-AC-PS: 1200/1600 watts
• S-AC-PS-15A: 930/1600 watts
Power cords shipped with the S-AC-PS and S-AC-PS-15A are country-dependent. Each power
cord must be plugged into an independent power circuit.
As you add modules to the S4 chassis, you may be required to install more power supplies.
Additional power supplies can be installed to provide redundancy. This would require
incremental power be added to the base power requirements of the chassis and its components,
depending on the power redundancy you want to support.
In a redundant power configuration, when at least two power supplies are installed, the power
from each power supply is evenly distributed. If one power supply fails, the second power supply
assumes the load. Additional power supplies share the load as required.
Be aware that when you receive your S4 chassis, a coverplate will be in place over all power
supply slots except PS1.
Power Supply Planning
Although each power supply requires its own circuit, when planning the S4 chassis power budget
you have the option of drawing from one or more sources by either the N + 1 or 1 + 1 method,
respectively.
The N + 1 method protects the S4 chassis against the failure of a single power supply although not
against an outage by that source. In a scheme where three modules are installed, you can assign all
three modules to one source. This is the most common approach to power supply planning.
Alternately, the 1 + 1 method has the advantage of protecting the S4 chassis against an outage by
one of the power sources as well as the failure of one or as many as half of your power supplies.
However, this method requires either a backup battery or another power source separate from the
first power source.
The number of power supplies required in an S4 chassis is determined by the number and types of
modules installed in the chassis and your power supply redundancy strategy.
To Next Page
Loading...
Need help?
General
