ZN
‐
NH21VE
Installation
Manual
2010/2
‐
1
01B.00
22
APPENDIX (B): POWER OVER ETHERNET
The
Power
over
Ethernet(PoE)
is
designed
to
extract
power
from
a
conventional
twisted
pair
Category
5
Ethernet
cable,
conforming
to
the
IEEE
802.3af
Power
‐
over
‐
Ethernet
(PoE)
standard.
IEEE
802.3af
allows
for
two
power
options
for
Category
5
cables.
The
PoE
module
signature
and
control
circuit
provides
the
PoE
compatibility
signature
and
power
classification
required
by
the
Power
Sourcing
Equipment
(PSE)
before
applying
up
to
15W
power
to
the
port.
The
high
efficiency
DC/DC
converter
operates
over
a
wide
input
voltage
range
and
provides
a
regulated
low
ripple
and
low
noise
output.
The
DC/DC
converter
also
has
built
‐
in
overload
and
short
‐
circuit
output
protection.
PoE compatibility
With
non
Power
Sourcing
Equipment
(PSE)
When
it
is
connected
with
non
PSE,
the
power
adaptor
should
be
connected.
With
power
adaptor
Connecting
both
PSE
and
power
adaptor
does
not
do
any
harm
to
the
products.
Disconnecting
power
adaptor
while
it
is
operating
does
not
stop
operation.
The
product
continues
to
work
without
rebooting.
Power classification
The
PoE
Power
Class
supported
by
the
IP
device
is
Class
0.
Class
Usage
Minimum
Power
Levels
Output
at
the
PSE
Maximum
Power
Levels
at
the
Powered
Device
0
Default
15.4W
0.44
to
12.95W
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