Juniper EX9214

you install a power supply of the other type while the switch is operang with one type
of power supply, the switch disables the power supply you installed and generates an
alarm.
This topic describes the AC power supplies in EX9214 switches.
AC Power Supply Descripon
The AC power supplies in EX9214 switches are hot-insertable and hot-removable eld-replaceable units
(FRUs).
You can install either two or four AC power supplies in an EX9214 switch. Power supplies are installed
at the rear of the chassis in slots PEM0 through PEM3 (le to right). Four power supplies provide full
redundancy.
WARNING: The switch is installed in a restricted-access locaon. It has a separate
protecve earthing terminal (sized for UNC 1/4-20 ground lugs) provided on the chassis
in addion to the grounding pin of the power supply cord. This separate protecve
earthing terminal must be permanently connected to earth.
CAUTION: Before switch installaon begins, ensure that a licensed electrician has
aached an appropriate grounding lug to the grounding cable that you supply. Using a
grounding cable with an incorrectly aached lug can damage the switch.
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