Brocade FastIron SX Series Chassis Hardware Installation Guide - Manual (Page 47)

Power supply LEDs TABLE 16
LED Desired
State Meaning Abnormal
State Meaning or Action
AC OK
(AC
supply
only) ON - Green
(steady) The power supply
is receiving AC
power from an AC
power source OFF The power supply is not receiving power from an
AC power source. You can do the following:
• Make sure that the power supply cord is
connected securely to the wall outlet and the
power supply.
• Make sure that the wall outlet is rated for
115/120V and 20A. If it is not, obtain a cable
that is compatibly rated for the outlet.
• Make sure that the wall outlet has power.
DC IN (DC
supply
only) Green
(steady) The power supply
is receiving DC
power from a DC
power source OFF The power supply is not receiving power from a DC
power source. You can do the following:
• Make sure that the power supply cables are
connected securely to the power source and
the power supply.
• Make sure that the DC power source is
48VDC @ 37.0 A.
• Make sure that the power source has power.
DC OUT ON - Green
(steady) The power supply
is supplying DC
output power to the
device OFF The power supply is not supplying DC output power
to the device.
If this occurs and the AC OK (AC power supply) or
DC IN (DC power supply) LED is Green, then there
is a problem with the power supply and it must be
replaced.
ALM OFF No alarms present
and the power
supply is in normal
operating condition. Amber There is an alarm present and the power supply is
malfunctioning.
Verify the AC or DC input and DC output voltages.
About redundant power supplies and power supply failure
A FastIron device with redundant power supplies can maintain full operation when one or more power
supplies fail. Power supply failure can be a failure of the supply itself or the office power grid connected
to the power supply.
A FastIron device can be either 1 + 1 redundant or N + 1 redundant. 1 + 1 redundancy implies that for
every power supply, there is another redundant (backup) power supply. In other words, half of the
supplies in the system can fail, and the system will still operate normally. N + 1 redundancy implies that
there is one redundant power supply for N power supplies, where N is a number greater than one. For
example, 3 + 1 redundancy means that in a system with four power supplies, the system will continue to
operate normally if one power supply fails, but will not operate if more than one power supplies fail.
Power consumption is equally distributed (within a certain percentage depending on power load or
power supply type) among all power supplies in the system. When a power supply fails, the power load
is redistributed equally among the remaining power supplies. Power consumption between PoE and
system power supplies is not shared, meaning loss of a system power supply does not impact a PoE
power supply, and vice versa.
About redundant power supplies and power supply failure
Brocade FastIron SX Series Chassis Hardware Installation Guide 45
53-1003092-01