•
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 device to protect the hardware components.
Table 24 on page 59 provides the required environmental conditions for normal switch operation for all
EX4650 models.
Table 24: EX4650 Environmental Tolerances
ToleranceDescription
No performance degradation to 6562 feet (2000 meters)Altitude
Normal operation ensured in relative humidity range of 5% through 90%,
noncondensing
•
Short-term operation ensured in relative humidity range of 5% through
93%, noncondensing
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.
Relative humidity
•
Normal operation ensured in temperature range of 32° F through 104° F
(0° C through 45° C)
•
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 EX4650 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.
59
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