environment up and running. Thus there is
no redundancy for some of the PDs in this
scenario, even though that was desired. This is
not a concern if all supplies in the switch are
the same power.
See Table 4 for the minimum and maximum
power supply counts for the different
zl switches.
Table 4. Switch power supply capacities
Watch the amount of power drawn from the
building power mains by the installed switch
supplies. It adds up quickly. Refer to table 1 for
incoming power requirements. If power
redundancy is very important, split the
available power supplies between two
separate building circuits. If one power main
goes down, you will still have the other one to
power the switch.
Note that the 1500 W supply is 200 V – 240 V
only.
PoE power levels
There are four PoE power levels defined by the
PoE IEEE 802.1af standard.
Table 5. IEEE 802.3af power classes
Power cords
The power cords available for these switches are
sized for the increased current that can be
drawn meeting the needs of PoE. As a result,
they are uncommon and it is recommended to
have a few spares on hand. For more details, see
Part 3 for the listing of power cords.
6
Product
number
J8697A
J8699A
J8698A
J8700A
J8715A
J9091A
Product
5406zl
5406zl-48G
5412zl
5412zl-96G
8212zl
base system
8212zl
chassis only
(replacement)
Included
supply
None
1 875 W
None
2 875 W
None
None
Min.
# of
supplies
needed
1
1
2
2
2
2
Max.
# of
supplies
possible
2
2
4
4
4
4
Max. #
of supplies
with the
Power Shelf
4
4
6
6
6
6
IEEE 802.3af class
0 (default)
1
2
3
4
Cisco pre-standard
Power
15.4 W
4 W
7 W
15.4 W
Future
6.3 W
