The ac-powered system does not require the use of an external surge protection
device (SPD).
The dc-powered system employs an isolated DC return (DC-I) design. The DC
battery return terminal
shall
not
be connected to the chassis or frame ground.
Table
21.
Temperature
and
humidity
requirements
for
storage
expansion
enclosure
in
a
Telco/NEBS-3
compliant
environment
Condition
Parameter
Requirement
Temperature
1
Operating range (up to 1800 m)
5° to 40° C (41° - 104° F)
Short-term
2
-5° to 50° C (23° - 122° F)
Short-term with fan failure
-5° to 40° C (23° - 104° F)
Maximum rate of change
30° C (54° F) per hour
Relative humidity
1
(no
condensation)
Operating range
5% to 85%
Short-term
2
5% to 90% (not to exceed 0.024
kg water/kg of dry air)
Notes:
1. In a Telco/NEBS-3 compliant environment, conditions are measured at a location 1.5 m
(59 in.) above the floor and 400 mm (15.8 in.) in front of the equipment.
2. Short-term refers to a period of not more than 96 consecutive hours and a total of not
more than 15 days in one year. (This refers to a total of 360 hours in any given year, but
no more than 15 occurrences during that one-year period.)
Table 22 applies to products that meet the altitude requirements.
Table
22.
Altitude
requirements
Environment
Altitude
Temperature
1
Operating
60 m (197 ft) below sea level
to 1800 m (6000 ft) above
sea level
5° to 40° C (41° - 104° F)
60 m (197 ft) below sea level
to 4000 m (13000 ft) above
sea level
5° to 30° C (41° - 54° F)
Notes:
1. Temperatures are aisle ambient as measured 1.5 m (59 in) above the floor and 400 mm
(15.8 in) in front of the equipment.
Table 23 applies to products that meet the altitude objectives.
Table
23.
Altitude
objectives
Environment
Altitude
Temperature
1
Operating
60 m (197 ft) below sea level
to 1800 m (6000 ft) above
sea level
5° to 50° C (41° - 122° F)
60 m (197 ft) below sea level
to 4000 m (13000 ft) above
sea level
5° to 40° C (41° - 104° F)
26
IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide
Summary of Contents for DS4000 EXP810
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Page 67: ...ds470067 Figure 20 Installing a bezel Chapter 2 Installing the EXP810 39...
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