CAUTION: On the DC power supply, the V+ terminals are shunted internally together,
as are the V– terminals. Terminal with the same polarity can be wired together from the
same source to provide an additional current path in a higher power chassis. Do not
connect the terminals to different sources.
describes the LEDs on the DC power supply.
Table 10: DC Power Supply LEDs
Label
Color
State
Description
IN (Input)
Unlit
Off
The power supply is disconnected from
power source, or the power supply is not
receiving power.
Green
On steadily
Power supply is receiving power.
OUT (Output)
Unlit
Off
Power supply output is off.
Green
On steadily
The power supply is sending out power
correctly.
! (Fault)
Amber
On steadily
An error is detected in the power supply.
Replace the power supply as soon as
possible. To maintain proper airflow
through the chassis, leave the power
supply installed in the chassis until you are
ready to replace it.
AC Power Cord Specifications for an EX9251 Switch
Each AC power supply has a single AC appliance inlet located on the faceplate that requires a dedicated
AC power feed. A detachable AC power cord is supplied with the AC power supply. The coupler is type
C13 as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of
the power cord fits into the power source outlet that is standard for your geographical location.
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