Installation Locations
56 7705 SAR-A Chassis Installation Guide
Installation Locations
The 7705 SAR-A chassis is intended to be installed at cell site huts or other facilities that
provide weather protection in an extended temperature-controlled environment. The
7705 SAR-A chassis is not intended for an outdoor installation. The chassis is designed to
work in an environment where protection is provided from ingress of contaminants, including
conductive pollution, mold growth, precipitation, volatile or corrosive chemicals (for
example, salt-laden air), hygroscopic dust, insects, pests, or vermin entering the product.
When installed in an outside plant, such as a hut, cabinet, or outside plant enclosure, it must
be installed in an environment where, except during installation and servicing, the
compartment is sealed and properly filtered.
The 7705 SAR-A chassis must be installed in a restricted access area, such as a dedicated
equipment room or an equipment closet, in accordance with Articles 110-16, 110-17, and
110-18 of the National Electric Code ANSI/ NFPA 70.
The humidity level in the cabinet must be controlled to ensure a relative humidity level
between 5% and 95% (non-condensing). The dew point threshold in the cabinet must not be
crossed. Typically, cabinets that comply with Telcordia GR-487, Generic Requirements for
Electronic Equipment Cabinets, provide this level of protection. These cabinets are sealed
and are provided either with air-to-air heat exchangers or with air-conditioning and/or heaters
as required for the local climate. If the cabinet is the type that allows outside air to ventilate
the cabinet, it must have Hydrophobic Membrane filters, at the air inlet and air exit, with all
other parts properly sealed against outside contaminants and moisture. Dust caps are provided
and must remain in place for unused ports.
The 7705 SAR-A chassis supports an extended temperature operation from –40° to 149°F
(–40 to 65°C) and a cold start from –40°F (–40°C). A minimum air movement of 0.5 m/s is
required (equivalent to a Harsh Protected Environment as per ATIS-6000010.01.2008 Class
2). The 7705 SAR-A can also operate in temperatures up to 140°F (60°C) in a sealed
environment (no air movement).
If the 7705 SAR-A chassis is powered by an Alcatel-Lucent external AC power supply
(100W High Voltage Power Supply), the AC power supply has an operating temperature
from –40° to 149°F (–40 to 65°C).
Warning: The 7705 SAR-A chassis must not be installed in the same compartment as the
batteries, which can give off gas. Out-gassing from batteries could not only have corrosive
effects, but could also result in an explosion. If batteries are located in the same cabinet, the
battery compartment must be completely sealed off from all other equipment and must be
properly ventilated for safety as required by product safety standards and local codes and
statutes.
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