Juniper EX9251, Руководство по оборудованию

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7. Either replace the power supply promptly or install a cover panel over the empty slot.
Figure 53: Removing an AC Power Supply from an EX9251 Switch
Installing an AC Power Supply in an EX9251 Switch
Before you install an AC power supply in the switch:
• Ensure you understand how to prevent electrostatic discharge (ESD) damage (see
Prevention of
Electrostatic Discharge Damage ).
Ensure that you have the following parts and tools available:
• An ESD wrist strap
• Phillips (+) screwdriver, number 2 (not provided)
The AC power supply in an EX9251 switch is a hot-insertable and hot-removable field-replaceable unit
(FRU). You can remove and replace it while the switch is running without turning off power to the switch
or disrupting switching functions. You can install up to two AC power supplies in an EX9251 switch. The
power supplies install in the slots on the rear panel of the chassis.
CAUTION: EX9251 switches use either AC or DC power supplies. Do not mix AC and
DC power supplies in a switch.
NOTE: Each AC power supply must be connected to a dedicated AC power source outlet.
To install an AC power supply in an EX9251 switch (see Figure 54 on page 126 ):
1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end
of the strap to the ESD point on the switch.
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