Juniper QFX5120 Series User Manual

NOTE: We recommend that you install covers in all unused power supply slots.
Step 3: Connect the QFX5120 Switch to Earth Ground
To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect
the switch to earth ground before you connect power to the switch. You must use the protective earthing terminal on
the switch chassis to connect the switch to ground.
NOTE: A ground connection to the protective earthing terminal is not required for an AC-powered switch. The
AC power cords provide adequate grounding when you connect the power supply in the switch to a grounded
AC power outlet by using the AC power cord appropriate for your geographical location.
WARNING: The switch is installed in a restricted-access location.
CAUTION: If an external ground connection is required, ensure that a licensed electrician has attached
an appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an
incorrectly attached lug can damage the switch.
To ground the QFX5120:
1. Connect one end of the grounding cable to a proper earth ground, such as the rack in which the switch is mounted.
2. Place the grounding lug attached to the grounding cable over the protective earthing terminal (see Figure 10 and
Figure 11). The protective earthing terminal is on the rear panel on a QFX5120-32C switch and on the left panel on a
QFX5120-48Y switch and a QFX5120-48T switch.
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Juniper QFX5120 Series Specifications

General

Rack Units	1 U
Junos OS	Yes
Form Factor	Fixed
Power Supply	Dual, hot-swappable
Cooling	Front-to-back or back-to-front airflow
Fans	Hot-swappable
Operating Temperature	32°F to 104°F (0°C to 40°C)
Storage Temperature	-40°F to 158°F (-40°C to 70°C)
Humidity	5% to 90% non-condensing
AC Power Input	100 to 240 VAC
Management Ports	1x RJ-45 console, 1x USB, 1x RJ-45 management