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AC Power Supply for a QFX5100 Device

The two power supplies in QFX5100 switches are hot-removable and hot-insertable field-replaceable units (FRUs). The power supplies are installed in the switch at the factory. You can install replacement power supplies from the management panel 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 1).

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 1 for an example of the 1 U design and Figure 2 for an example of the 2 U power supply.

Figure 1: 1 U AC Power Supply in QFX5100 Switches1 U AC Power Supply in QFX5100 Switches
  1

Handle

  3

AC appliance inlet

  2

Security latch

  4

Ejector lever

Figure 2: 2 U AC Power Supply in a QFX5100-96S Switch2 U AC Power Supply in a QFX5100-96S Switch

The power supply provides FRU-to-port or port-to-FRU airflow depending on the product SKU you purchase. On legacy switches, or switches with an LCD, this airflow is called back-to-front and front-to-back. The power supplies have color-coded handles with a fan icon. See Figure 3 for an example of the power supply. A power supply with a blue handle denotes FRU-to-port airflow; a power supply with a gold-colored handle denotes port-to-FRU airflow.

Figure 3: Power Supply Handle DetailPower Supply Handle Detail
  1

Fan icon on handle

 
CAUTION:

Verify that the airflow direction on the power supply handle matches the direction of airflow in the chassis. Ensure that each power supply you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm. If you need to convert the airflow pattern on a chassis, you must change out all the fans and power supplies at one time to use the new direction.

Table 1 shows the different power supplies and their direction of airflow.

Table 1: Airflow Direction in QFX5100 AC Power Supplies

QFX5100 Product SKUs

Wattage

Product Number

Direction of Airflow

Color of Power Supply Handle

QFX5100-24Q

QFX5100-48S

QFX5100-48SH

QFX5100-48T

QFX5100-48TH

650 W

JPSU-650W-AC-AFI

QFXC01-PWRACI-650A (older version)

FRU-to-port

Juniper Azure Blue

QFX5100-96S

850 W

JPSU-850W-AC-AFI

QFX5100-24Q

QFX5100-48S

QFX5100-48SH

QFX5100-48T

QFX5100-48TH

650 W

JPSU-650W-AC-AFO

QFXC01-PWRACO-650A (older version)

Port-to-FRU

Juniper Gold

QFX5100-96S

850 W

JPSU-850W-AC-AFO

To avoid electrical injury, carefully follow instructions in Connecting AC Power to a QFX5100 Device.