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Maintain ambient airflow for normal operation of the device. If the airflow is blocked or restricted, or if
the intake air is too warm, the device might overheat, leading to the device temperature monitor shutting
down the device to protect the hardware components.
Table 21 on page 45
provides the required environmental conditions for normal operation of the device.
Table 21: NFX350 Device Environmental Tolerances
Description
Altitude
Relative humidity
Temperature
Site Electrical Wiring Guidelines
Table 22 on page 45
describes the factors you must consider while planning the electrical wiring at your
site.
WARNING:
electrical surge-suppression devices.
Table 22: Site Electrical Wiring Guidelines
Site Wiring Factor
Signaling limitations
Tolerance
No performance degradation up to 2000 meters at 96° F (40° C)
Normal operation ensured in relative humidity range of 5% through 90%,
noncondensing
Normal operation ensured in temperature range of 32° F through 122° F
(0° C through 40° C)
You must provide a properly grounded and shielded environment and use
Guidelines
If your site experiences any of the following problems, consult experts in electrical surge
suppression and shielding:
Improperly installed wires cause radio frequency interference (RFI).
Damage from lightning strikes occurs when wires exceed recommended distances or
pass between buildings.
Electromagnetic pulses (EMPs) caused by lightning damage unshielded conductors and
electronic devices.
45
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