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24
C
2: I
HAPTER
NSTALLING THE
Important Steps
Before Proceeding
Connecting a
Redundant Power
Supply to your
Switch 4500 PWR
S
WITCH
Before proceeding, make sure to access the Switch 4500 information on
3Com's Web site at www.3Com.com and:
Read the document entitled "3Com Switch Family Safety and
■
Regulatory Information," which contains information on how to
set-up your Switch 4500 and all the safety and regulatory warnings.
Refer to the document entitled "Important Information" for
■
instructions on how to retrieve the latest documentation and software
for your switch.
Set-up your switch in the desired location.
■
Download the documentation to your local hard-drive or to an
■
accessible server.
The Switch 4500 PWR 26 and 50 port have a -48V DC Redundant Power
Supply socket that can be used in addition to the standard AC connection
of the switch. If you intend to use this DC connection, please read this
section.
WARNING: The installation of the Redundant Power Supply (RPS) should
only be carried out by properly trained and qualified personnel.
WARNING: These instructions must be read in conjunction with the RPS
flyer and the safety and installation instructions supplied with your RPS.
WARNING: When powering any Switch 4500 PWR from an RPS, the unit
must be earthed (grounded). This can be achieved by either connecting
the power cord to the unit or by connecting the earth terminal on the
rear of the unit to a reliable electrical earth, or by connecting both. You
must ensure that the earth connection is made before connecting the DC
supply from the RPS.
3Com Switches which support -48V DC RPS inputs, that are PoE enabled,
can only be powered by an RPS which complies with the isolation
requirements of IEEE-Std 802.3af. Non PoE enabled switches do not have
this restriction.
WARNING: A standard 'positive-earthed' -48V redundant power system
suitable for use with telecommunications equipment should not be used
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