Comtrol ES7510 - Manual (Page 64)

64 - Power over Ethernet RocketLinx ES7510 User Guide: 2000544 Rev. B
Configuration Using the Web Interface
Power over Ethernet
Power over Ethernet is one of the key features of the ES7510. The ES7510 is IEEE 802.3af and IEEE 802.3at
compliant. The ES7510 supports up to eight PoE injectors ports, each port with the ability to deliver 30W of
power.
The following pages are included in this section:
• PoE Control
• PoE Scheduling on Page 66
• PoE Status on Page 67
PoE Control
In WiMax systems, wireless applications, and high-
end PoE applications, there are various types of
powered devices (PDs). To be compatible with
different PDs, the ES7510 is designed with three
powering modes, including:
• IEEE 802.3af mode
• IEEE 802.3at (LLDP classification mode)
• Forced powering mode to meet any PD type
IEEE 802.3at LLDP provides smart power budget
control behavior to fulfill the needs of higher end
setups requiring exact high power delivery. By
using the ongoing dynamic re-negotiation function
of the IEEE 802.3at LLDP, the ES7510 can perform
more intelligently by dynamically reallocating
power to the PDs. The ES7510 implements the 2
event and Link Layer Discovery Protocol (LLDP)
PoE into the system for efficient power budget
negotiation between the PSE and the PDs.
The ES7510 also provides PD Status Detection.
This provides automatic detection of a remote
device powered by the ES7510. If the remote
system crashes or is unstable, the ES7510
performs a system reboot by turning off and on
again to trigger the remote device.
Note: If Forced mode is selected, power is
provided even if no Ethernet cable is plugged
in. Only use Forced mode if you are
attaching a device that is capable of
receiving power through its Ethernet
connection.
In IEEE 802.3at mode, the PSE recognizes the PD. It then emits a single classification pulse, and determines
that the PD is IEEE 802.3at high power. The PDs PoE control circuit marks that the PSE supports 1-event
classification. Later, the PSE applies 15.4W power to the PD and hence, starts the operation of PDs CPU and
networking block. If the PDs PoE CPU requests over 12.95W high power by LLDP, the LLDP packet is sent to
the PSE with the high power request. The PSE then allocates the request and sends back the 20W power to
start up the high power requesting device.
DO NOT TOUCH THE DEVICE
SURFACE DURING PoE OPERATION
- HIGH POWER FEEDING.