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HP ProCurve 2520 Planning And Implementation Manual: Mixed J8712a And J8713a Configurations

Procurve power over ethernet (poe/poe+).
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Mixed J8712A and J8713A Configurations

N o t e
HP Procurve highly recommends that the two types of power supplies are not
mixed in the same 5412zl or 8212zl chassis.
Although mixing power supplies is not recommended, the following examples
demonstrate the most common usages. Refer to page 10-13 for the discussion
on failover in a mixed power supply environment.
Figure 10-17.Example of a 5412zl with three power supplies (two J8712A and one J8713A)
This configuration (Figure 10-17) is an example of three power supplies two
J8712As supplying 546 watts and one J8713A supplying 900 watts for a
maximum of 1446 watts. Therefore out of the total 288 available ports, 93 can
be powered at 15.4 watts each.
Source of Power
Watts Available
Three Internal PoE
1446 (without
Power Supplies: two
J8712As one J8713A
Redundancy now becomes an issue. You can use the one J8713A (900 watts)
to backup the two J8712As if either one of them fails, but you cannot use the
two J8712As to backup the J8713A as they don't have enough PoE power.
# of Ports Powered and Average
93 @ average 15.4 W each
192 @ average 7.5 W each
288 @ average 4.0 W each
Planning and Implementation for the 5400zl/8200zl Switches
900 watts
for PoE
273 watts
for PoE
Redundant # of Ports Powered and
Average watts/Port
Configuration Examples
273 watts
for PoE


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