Fuse; Specifications - Extreme Networks BlackDiamond 8800 Series Hardware Installation Manual

Fuse

The Extreme Networks 600/900 W AC PSU line and neutral legs are both fused. Power to the system
may still be live if the neutral fuse is open. This is not a field operator replaceable fuse. In the event of
failure, immediately return the Extreme Networks 600/900 W AC PSU for a complete replacement.
WARNING!
Field operators must not attempt to configure or replace fuses in Extreme Networks 600/900 W AC PSUs! In the
event of failure, immediately return the defective Extreme Networks 600/900 W AC PSU for a complete
replacement.

Specifications

The 600/900 W AC PSU functions from 90 V to 264 V and 47 Hz to 63 Hz AC Input. Each PSU 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.
A greater number of PSUs 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.
When a combination of 600/900 W AC PSUs and 700/1200 W AC PSUs is powered on in the same
BlackDiamond 8806 chassis, all PSUs will be budgeted down to the lower powered 600/900 W AC
output values to avoid PSU shutdown due to over-current. ExtremeXOS optimizes total system power,
avoiding the possibility of over-current, by deciding whether to budget down PSUs with 220 V AC
inputs when PSUs with 110 V AC inputs are present, or to keep 110 V AC PSUs disabled.
CAUTION
Even though this process avoids the possibility of over-current, an I/O module may be powered off if a
600/900 W AC PSU is added to an existing BlackDiamond 8806 system running in the following configuration:
●
The system is powered by three 700/1200 W AC PSUs 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 PSU to an existing BlackDiamond
8806 system running in the configuration listed above. Extreme Networks also recommends that you not mix220 V
AC and 110 V AC inputs along with the mixing of both PSU types, 600/900 W and 700/1200 W. 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 PSU type but not for a mixture of PSU types.
CAUTION
The 600/900 W AC PSU does not have a switch for turning the unit on and off. Remove the plug from the electrical
outlet to disconnect power to the 600/900 W AC PSU. Make sure that this connection is easily accessible.
Make sure that the 600/900 W AC PSU circuit is not overloaded. Use proper over-current protection, such as a
circuit-breaker, to prevent over-current conditions.
Extreme Networks Consolidated ExtremeXOS Hardware Installation Guide
Extreme Networks 600/900 W AC PSU
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