AC Power Supplies

Two AC power supply models, ordered separately, are available for the SSA:

• SSA-AC-PS-625W
• SSA-AC-PS-1000W

The SSA AC power supplies automatically adjust to the input voltage and frequency, which allows for an input voltage of 100 to 240 VAC, and a frequency between 50 and 60 Hz. See the operating specifications in SSA Specifications. No additional adjustments are necessary. For installations in North America, a 15 Amp power cord is required. See Powering Up the SSA for more details.

You can install up to two power supplies in the rear of the SSA chassis. Two operational modes of power supply redundancy are supported:

• Redundant mode, in which the power made available to the system is equal to the maximum output of the lowest rated supply. If you choose to use two power supplies in a redundant power configuration, system power redundancy is guaranteed if one supply is lost. Power supplies are hot swappable in this operational mode.
• Non-redundant, or additive, mode, in which the combined output of both supplies is made available to the system. If you choose to use two power supplies in a non-redundant power configuration, the loss of a single supply may result in a system reset. Power supplies are not hot swappable in this operational mode.

The following power configurations are supported:

• Redundant
  • 625 watts (2 x 625)
  • 625 watts (625 + 1000)
  • 1000 watts (2 x 1000)
• Non-redundant (additive)
• 625 watts (1 x 625)
• 1000 watts (1 x 1000)
• 1250 watts (2 x 625)
• 1625 watts (1000 + 625)
• 2000 watts (2 x 1000)

For more information, see Powering Up the SSA.

For information about the power supply LEDs, see Power Supply LED Status Definitions.