Juniper QFX5120 Series Hardware Guide

QFX5120 Fan Module Status | 36
Management Port LEDs on QFX5120 Switches | 37
Network Port LEDs on QFX5120 Switches | 38
QFX5120 Cooling System | 41
QFX5120 Cooling System | 42
QFX5120 Models and Airflow Direction | 43
QFX5120 Models with Front-to-Back Airflow | 45
QFX5120 Models with Back-to-Front Airflow | 47
Positioning the Switch | 48
QFX5120 Fan Module Status | 49
QFX5120 Power System | 49
AC Power Supply in QFX5120 Switches | 50
AC Power Supply Specifications for QFX5120 Switches | 50
AC Power Supply Airflow | 51
AC Power Supply Specifications for QFX5120 Switches | 52
AC Power Cord Specifications for QFX5120 Switches | 53
AC Power Supply LEDs in QFX5120 Switches | 55
DC Power Supply in QFX5120 Switches | 57
Characteristics of a DC Power Supply | 58
DC Power Supply Airflow | 59
QFX5120 DC Power Specifications | 60
DC Power Supply LEDs in QFX5120 Switches | 60
Site Planning, Preparation, and Specifications
2
Site Preparation Checklist for QFX5120 Switches | 65
QFX5120 Site Guidelines and Requirements | 66
Environmental Requirements and Specifications for QFX5120 Switches | 66
General Site Guidelines | 68
Site Electrical Wiring Guidelines | 68
Rack Requirements for QFX5120 Switches | 69
Cabinet Requirements for QFX5120 Switches | 70
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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