Reference Guide

NOTE: When operating in the expanded temperature range, ambient temperature warnings may be reported in the
System Event Log.
Operating temperature derating specifications
Table 15. Operating temperature
Operating temperature derating Specifications
< 35°C (95°F) Maximum temperature is reduced by 1°C/300 m (1°F/547 ft)
above 950 meters (3,117 ft)
35°C–40°C (95°F–104°F) Maximum temperature is reduced by 1°C/175 m (1°F/319 ft)
above 950 meters (3,117 ft)
> 45°C (113°F) Maximum temperature is reduced by 1°C/125 m (1°F/228 ft)
above 950 meters (3,117 ft)
Relative humidity specifications
Table 16. Relative humidity specifications
Relative humidity Specifications
Storage 5% to 95% RH with 33°C (91°F) maximum dew point.
Atmosphere must be non-condensing at all times.
Operating 10% to 80% relative humidity with 29°C (84.2°F) maximum dew
point
Temperature specifications
Table 17. Temperature specifications
Temperature Specifications
Storage –40°C–65°C (–40°F-149°F)
Continuous operation (for altitude less than 950 m or 3117 ft) 10°C–35°C (50°F-95°F) with no direct sunlight on the
equipment.
Fresh air For information about fresh air, see Expanded Operating
Temperature section.
Maximum temperature gradient (operating and storage) 20°C/h (68°F/h)
NOTE: Some configurations require a lower ambient temperature for more information, see the Standard operating
temperature specifications.
Thermal restrictions
Table 18. Thermal restrictions matrix for dual processors
Maximum continuous operating inlet temperature (°C)
3.5" Chassis 2.5" Chassis No-BP
Chassi
s
TDP
Watts
Proc
No.
DPN
of
Max
DIMM
12x
HDDs
8x
HDDs
4x
HDDs
24x
HDDs
20x
HDDs
16x
HDDs
12x
HDDs
8x
HDDs
4x
HDDs
N/A
Technical specifications 17