Dell PowerEdge M520 Technical Guide - Page 40

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. Table 23. Environmental specifications Fresh Air: temperature, humidity, altitude de-rating Continuous operation Expanded operation 10°C to 35°C (50°F to 95°F) at 10% to 80% relative humidity with 26°C (78.8°F) maximum 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). When operating in the expanded temperature range, system performance may be impacted, 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: - 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.  Non Dell qualified peripheral cards and/or peripheral cards greater than 25W are not supported. Temperature Operating Storage See Fresh Air for temperature information -40oC to 65oC (-40oF to 149oF) with a maximum temperature gradation of 20oC per hour 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 40 PowerEdge M520 Technical Guide