Allied Telesis AT-MCF112VF, SM, LH - Manual (Page 18)

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Optional Redundant Power Supply Slot
The rear panel of the multichannel media converter contains an expansion
slot for an optional redundant power supply. When installed, the optional
power supply shares the load of powering the unit with the standard power
supply that comes with the system. If one power supply fails, the remaining
unit assumes the role of providing all power to the system, thereby protecting
the unit from a system failure.
An LED on the front panel of the unit reflects the status of an optional
redundant power supply, if installed. When the redundant power supply is
operating properly, its LED is a steady green.
Both the redundant power supply and the main power supply can be “hot
swapped.” This means that should either power supply fail, the failed unit can
be removed and replaced with a new power supply while the unit is operating,
without network operations being interrupted.
Each power supply has its own power cord. By connecting the two power cords
to outlets on separate power supply circuits, you increase the protection to
your media converter from operational failure should a power circuit fail.
Note
A redundant power supply is strongly recommended for the
AT-MCF112xx Multichannel Media Converter to help avoid a “single
point of failure” to as many as twelve links.
Power Inlet
The unit does not have an ON/OFF power switch. Power is applied to and
removed from the system by connecting and disconnecting the power cable.
Warning
Power cord is used as a disconnection device: To de-energize
equipment, disconnect the power cord.
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