Specifications

Table 24 lists power supply specifications for the PowerEdge R520.
Specification
495W AC
550W AC
750W AC
1100W AC
1100W DC
Current
consumption
6.5A–3A
7.4A–3.7A
10A–5A
12A–6.5A
32A (X2)
Supply voltage
100–240
VAC
1
100–240
VAC
1
100–240
VAC
1
100–240
VAC
1
-48V to -60
VDC
Frequency
50/60Hz
50/60Hz
50/60Hz
50/60Hz
N/A
Heat dissipation
(BTU/hr max)
1908
2315
2891
4100
4416
1
Auto-ranging
Table 25 details the environmental specifications for the R520. For additional information about
environmental measurements for specific system configurations, see
Dell.com/environmental_datasheets.
Fresh Air: temperature, humidity, altitude de-rating
Continuous
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).
Expanded
operation
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:
 System must have six fans
 Processors not supported: 130W, 4-core processors, 135W processors, Intel Core
processors
 Non-redundant power supplies not supported
 Non Dell-qualified peripheral cards and/or cards greater than 25W are not supported