Connecting a Redundant Power Supply
35
■
Uninterruptible Power
— the system allows easy connection and
maintenance of batteries to the RPS shelf to further increase the
availability of the system.
■
Additional Power to PoE Ports
— the internal AC Power Supply of
a PoE Switch can provide enough power for most network
applications. The RPS can be used to supplement additional power (up
to a maximum of 15.4W), including full backup of all PoE devices on
the network.
Table 9
below, outlines the behavior of the Switch when changes occur to
the power system, such as removing the AC mains cable when the RPS is
attached. The responses to the different power inputs are controlled by
the Switch’s internal power supply and not by the RPS.
Table 9
Switch Power Inputs
Power Input before
User Intervention
Power Input after
User Intervention
Correct Response
AC mains and RPS
RPS only
The unit remains powered by the RPS.
AC mains and RPS
AC mains only
The unit is powered by the AC mains.
PoE dropped on all ports, however
the unit does not reset. PoE restarts
powered by the remaining power
from the AC mains. PoE ports will be
dropped depending on their preset
priority level.
The total power available to the
Switch may be less than when
powered from the RPS. Some PoE
ports may be dropped as they are
unable to obtain the power they
require.
RPS only
AC mains and RPS
The unit remains powered by the RPS.
AC mains
AC mains and RPS
The unit is powered by the RPS. PoE
ports can be added.
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Страница 48: ...48 CHAPTER 2 INSTALLING THE SWITCH...
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