Environmental specifications
For additional information about environmental measurements for specific system configurations,
see Dell.com/environmental_datasheets. Table 23 details the environmental specifications for the
PowerEdge M520.
Fresh Air: temperature, humidity, altitude de-rating
Continuous
10°C to 35°C (50°F to 95°F) at 10% to 80% relative humidity with 26°C (78.8°F) maximum
operation
dew point (maximum wet bulb temperature). De-rate maximum allowable dry bulb
temperature at 1°C per 300m above 950m (1°F per 547 ft above 3117 ft).
Expanded
When operating in the expanded temperature range, system performance may be impacted,
operation
and ambient temperature warnings may be reported on the LCD and in the System Event
Log.
≤ 10% of annual operating hours: 5°C to 10°C and 35°C to 40°C (with no direct sunlight on
the equipment) at 5% to 85% relative humidity with 26°C dew point (maximum wet bulb
temperature). Outside the standard operating temperature (10°C to 35°C), the system can
operate down to 5°C or up to 40°C for a maximum of 10% of its annual operating hours. For
temperatures between 35°C and 40°C (95°F to 104°F), de-rate maximum allowable dry bulb
temperature by 1°C per 175m above 950m (1°F per 319 ft above 3117 ft).
≤ 1% of annual operating hours: –5°C to 5°C and 40°C to 45°C (with no direct sunlight on
the equipment) at 5% to 90% relative humidity with 26°C dew point (maximum wet bulb
temperature). Outside the standard operating temperature (10°C to 35°C), the system can
operate down to –5°C or up to 45°C for a maximum of 1% of its annual operating hours. For
temperatures between 40°C and 45°C (104°F to 113°F), de-rate maximum allowable dry bulb
temperature by 1°C per 125m above 950m (1°F per 228 ft above 3117 ft).
Expanded operation restrictions:
Maximum 95W processor is supported.
Dell PERC H710 and H710P cards are not supported in dual-processor configurations.
When populating the blade slots in the enclosure with only PowerEdge M520 blades:
—
—
—
Non Dell qualified peripheral cards and/or peripheral cards greater than 25W are not
supported.
Temperature
Operating
See Fresh Air for temperature information
o
Storage
–40
C to 65
Relative humidity
Operating
See Fresh Air for relative humidity information
Storage
5% to 95% at a maximum wet bulb temperature of 33°C (91°F); atmosphere must be
non-condensing at all times
PowerEdge M520 Technical Guide
40
Table 23.
Environmental specifications
Dual-processor blade servers with PERC H310 cards cannot be mixed with
single-processor blades.
To support a PERC H310 card in a dual-processor configuration, the blade slots in
the M1000e enclosure must be installed with M520 blades or a combination of
blade blanks and M520 blades.
The Dell PowerEdge M520 blades must be installed with 109 mm wide heat sinks.
o
o
o
C (-40
F to 149
F) with a maximum temperature gradation of 20
o
C per hour
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