Allied Telesis SwitchBlade x8100 Series - Manual (Page 8)

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SwitchBlade x8100 Series | System Overview
SwitchBlade x8100 Series – Power Supplies
and Cooling
The SwitchBlade x8100 Series includes AC and DC system
power supply options. Optional PoE power supplies will supply
power to endpoints when used with the SBx81GP24 line card.
The power supplies and fan tray available are:
■ SBxPWRSYS1 (1200W AC System Power Supply)
■ SBxPWRSYS1-80 (1200W DC System Power Supply)
■ SBxPWRPOE1 (1200W AC PoE Power Supply)
■ SBxFAN12 (Fan tray for 12 slot chassis)
■ SBxFAN06 (Fan tray for 6 slot chassis)
PoE PSUs
A PoE power supply (SBxPWRPOE1) will fit into the system
PSU bay, but they are electronically keyed so it will not power
up and the chassis won’t boot. Correct PSU placement must be
observed for the system to function correctly.
The SwitchBlade x8100 Series supports PoE+, which supplies
the higher power required from a new generation of network
attached devices. These new devices, such as pan tilt and zoom
IP security cameras, touch screen displays and so on, frequently
require more than the 12.95W available with standard PoE
(IEEE 802.3af). PoE+ (IEEE 802.3at) can provide up to 30W of
power, with a powered device able to draw up to 25.5W.
The SwitchBlade x8100 Series supports one or two 1200W
PoE PSUs, so 2400W maximum. This allows power to be
supplied to 80 devices (at the maximum PoE+ specification
of 30W) or 155 devices (at the maximum PoE specification of
15.4W). For devices like IP phones which require less power
(class 2 PoE of around 7W) then a larger number can be
supported.
The SwitchBlade x8100 will quite likely be connected to a
number of different PoE devices, such as IP phones, security
cameras and so on, with each type of device requiring different
power levels. Power budgeting manages the allocation of power
to the devices connected to SBx81GP24 PoE line cards. This
ensures the most efficient use of the 2400W available, and
support for the maximum number of PoE devices.
As with other AlliedWare Plus switches that support PoE,
priority can be set for specific ports (low, high, and critical). This
ensures that important devices continue to receive power even
if the total power budget is exceeded, with power delivered
first to critical, then high, and then low priority devices. Power
capacity for a port can be set to anything from 4W to 30W, and
PoE can also be disabled for a port if desired.
More information on PoE and its operation can be found in the
SwitchBlade x8100 Series software reference manual.
System PSUs
As with other Allied Telesis advanced switches using modular
power supplies, one PSU is enough to power the complete
SwitchBlade x8100 system. A second power supply will load-
share and provide redundancy. PSUs and the fan tray are all hot-
swappable so no downtime is encountered during maintenance.
The two system and two PoE power supplies have individual
power cord receptacles on the rear of the chassis, so each
can be fed from separate power sources if desired to further
increase reliability and resiliency. For specific power outlet
requirements (dependent on voltage in your country) see the
installation guide.
System and PoE power cord receptacles