CHAPTER 4
Power Supplies
•
AC Power Supply for a QFX5100 Device on page 47
•
DC Power Supply in a QFX5100 Device on page 49
•
Grounding Cable and Lug Specifications for a QFX5100 Device on page 51
AC Power Supply for a QFX5100 Device
The QFX5100 switches are shipped from the factory with two power supplies. Eachpower
supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the
second power supply is installed and running. You can install replacement power supplies
in the two slots next to the fan modules without powering off the switch or disrupting
the switching function.
The AC power supply in 1 U QFX5100 switches is 650 W; the AC power supply in the 2 U,
QFX5100-96S switch, is 850 W. Both power supplies look identical. Be sure to use the
correct power supply for your chassis product SKU (see Table 12 on page 49).
CAUTION: Do not mix power supplies with different airflow or different
wattage. The system raises an alarm when a power supply having a different
airflow or wattage is inserted into the chassis.
See Figure 28 on page 48 for an example of the 1 U design and Figure 29 on page 48 for
an example of the 2 U power supply.
47Copyright © 2016, Juniper Networks, Inc.
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