Juniper QFX3500, Техническая документация

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Table 20: QFX3500 Device Environmental Tolerances (continued)
Tolerance Description
•
Normal operation ensured in temperature range of 32° F through 104° F (0° C through
40° C)
•
Short-term operation ensured in temperature range of 23° F through 131° F (–5° C
through 55° C)
NOTE: As defined in NEBS GR-63-CORE, Issue 3, short-term events can be up to 96
hours in duration but not more than 15 days per year.
•
Nonoperating storage temperature in shipping container: –40° F through 158° F (–40° C
through 70° C)
Temperature
Designed to comply with Zone 4 earthquake requirements per NEBS GR-63-CORE, Issue
3.
Seismic
NOTE: Install QFX Series devices only in restricted areas, such as dedicated equipment rooms
and equipment closets, in accordance with Articles 110-16, 110-17, and 110-18 of the National
Electrical Code, ANSI/NFPA 70.
RELATED DOCUMENTATION
Clearance Requirements for Airflow and Hardware Maintenance for a QFX3500 Device | 125
Installing and Connecting a QFX3500 Device | 326
Environmental Requirements and Specifications for EX Series Switches
The switch must be installed in a rack or cabinet housed in a dry, clean, well-ventilated, and
temperature-controlled environment.
Ensure that these environmental guidelines are followed:
•
The site must be as dust-free as possible, because dust can clog air intake vents and filters, reducing the
efficiency of the switch cooling system.
•
Maintain ambient airflow for normal switch operation. If the airflow is blocked or restricted, or if the
intake air is too warm, the switch might overheat, leading to the switch temperature monitor shutting
down the switch to protect the hardware components.
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