Poe Classes And Power Ratings - Juniper SRX 210 Services Hardware Manual

SRX 210 Services Gateway Hardware Guide
Table 16: SRX 210 Services Gateway PoE Specifications (continued)
Power Management Schemes
Per port power limit
Power management modes

PoE Classes and Power Ratings

A powered device is classified based on the maximum power that it draws across
all input voltages and operational modes. When Class-based power management
mode is configured on the gateway, power is allocated taking into account the
maximum power ratings defined for the different classes of devices.
Table 17 on page 36 lists the classes and their power ratings as specified by the IEEE
802.3 AF standard.
Table 17: PoE Classes and Power Ratings on the SRX 210 Services Gateway
Class
0
1
2
3
4
36
SRX 210 Services Gateway PoE Overview
Values
15.4 watts
Static: power allocated for each interface can be
configured
Class: power allocation for interfaces is decided based
on the class of powered device connected
Usage
Default
Optional
Optional
Optional
Reserved
Maximum Power Levels Output from
PoE Port
15.4 Watts
4.0 Watts
7.0 Watts
15.4 Watts
All class-4 powered devices are treated
as class 0.