Confidential and proprietary information of Extreme Networks. © 2011 Extreme Networks, Inc.
All rights reserved. DRAFT. October 20, 2011
Summit Family Switches Hardware Installation Guide
113
Disconnecting the EPS-C/EPS-600LS
To manually disconnect an EPS-C or to remove the EPS-600LS modules, the recommended practice is to
disconnect the EPS-600LS modules one at a time, pausing two seconds after each EPS-600LS disconnect.
This enables a graceful power transition from the external power supplies to the internal power supply.
Example: Two active EPS-600LS modules in an EPS-C
a Unplug one EPS-600LS unit from its power source.
PoE power is automatically reduced to 370 watts and the internal switch power supply is
enabled, providing redundant 370 watt PoE power.
b Wait at least two seconds before disconnecting the remaining EPS-600LS unit.
c Unplug the second EPS-600LS unit from its power source.
The internal power supply is already enabled and provides uninterrupted 370 watts of PoE
power.
After an EPS-600LS unit is disconnected from its power source, it may be removed from the EPS-C.
See “Removing an EPS-600LS Power Module” on page 291 for disconnection and removal instructions.
d Disconnect the EPS-C from the switch.
EPS-150DC External Power Module (with EPS-T2)
The EPS-150DC External Power Module (Model 10909) is a modular power supply for use in the EPS-T2
External Power System Tray. You can use the EPS-150DC as a redundant power supply with the
following Extreme Networks switches:
● Summit X250e-24tDC switch
● Summit X250e-24xDC switch
● Summit X250e-48tDC switch
● Summit X450a-24tDC switch
● Summit X450a-24xDC switch
● Summit X450a-48tDC switch
When this power supply is used with one of the listed Summit switches, the internal and external
power supplies are fully fault tolerant and load-sharing. If one power supply fails, the other power
supply will provide sufficient power to operate the switch.
The EPS-T2 is a rack-mountable chassis or tray that holds one or two EPS-150DC power supplies. Each
EPS-150DC provides one-to-one redundancy to an attached Extreme switch. You must install the
EPS-150DC power supply in the EPS-T2 tray.
The front panel of the EPS-150DC unit has a green LED to indicate operating status (
Table 36).
Table 36: LED Meanings on the EPS-150DC Power Supply
Power LED Meaning
Green, solid The external power module is operating normally.
Off The external power module is not connected.
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