Specifications; Combining Different Ac Power Supply Models - Extreme Networks BlackDiamond 8806 Hardware Installation Manual

Specifications

The 600/900 W AC power supply functions from 90 V to 264 V and 47 Hz to 63 Hz AC Input. Each
power supply provides 600 W to the system if the AC input is in the 110 V low-line output power range
and 900 W to the system if the AC input is in the 220 V high-line output power range.
More installed power supplies are needed to support the load if the low-line power range is used to
power the switch. The software determines the maximum available power required for the switch and
enables the modules accordingly.

Combining Different AC Power Supply Models

When 600/900 W AC power supplies and 700/1200 W AC power supplies are combined in the same
BlackDiamond 8806 chassis and are powered on, all power supplies will be budgeted down to the lower
powered 600/900 W AC output values to avoid power supply shutdown due to over-current.
ExtremeXOS optimizes total system power, avoiding the possibility of over-current, by deciding
whether to budget down power supplies with 220 V AC inputs when power supplies with 110 V AC
inputs are present, or to keep 110 V AC power supplies disabled.
CAUTION
Although this process avoids the possibility of over-current, an I/O module may still be powered
off if a 600/900 W AC power supply is added to a BlackDiamond 8806 system running in the configuration
described below.
The system is powered by three 700/1200 W AC power supplies at 220 V AC.
●
The system includes four or more PoE I/O modules with a PoE power requirement that falls
●
between 2391 W and 2438 W of inline power.
To avoid causing an I/O module to be powered off, do not add a 600/900 W AC power supply to an
existing BlackDiamond 8806 system running in the configuration listed above. Extreme Networks also
recommends that you avoid mixing 220 V AC and 110 V AC inputs when both 600/900 W and
700/1200 W power supplies are present in the same system. When a combination of 220 V AC and 110
V AC inputs is applied, ExtremeXOS is designed to optimize total chassis power for each individual
power supply type but not for a mixture of power supply types.
BlackDiamond 8800 Series Switches Hardware Installation Guide
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