Dell PowerEdge R820 - Manual (Page 7)

Power
AC Power Supply (per power supply)
Wattage 750 W or 1100 W
Heat dissipation
NOTE: Heat dissipation is calculated using
the power supply wattage rating.
2891 BTU/hr maximum (750 W power supply)
4100 BTU/hr maximum (1100 W power supply)
Voltage
NOTE: This system is also designed to be
connected to IT power systems with a
phase to phase voltage not exceeding 230 V.
100–240 V AC, autoranging, 50/60 Hz
DC Power Supply (per power supply) (when
available)
Wattage 1100 W
Heat dissipation
NOTE: Heat dissipation is calculated using
the power supply wattage rating.
4416 BTU/hr maximum
Voltage –(48–60) V DC
Battery
Coin-cell battery 3 V CR2032 Lithium coin cell
Physical
Height 86.8 mm (3.41 inch)
Width
With rack latches 482.4 mm (18.98 inch)
Without rack latches 434 mm (17.08 inch)
Depth (includes bezel) 810.6 mm (31.91 inch)
Weight (maximum) 29.5 kg (65.036 lb)
Weight (empty) 22.45 kg (49.494 lb)
Environmental
NOTE: For additional information about environmental measurements for specific system configurations, see
dell.com/environmental_datasheets.
Temperature
Operating Continuous operation: 10 °C to 35 °C at 10% to 80% relative
humidity (RH), with 26 °C max dew point. De-rate maximum
allowable dry bulb temperature at 1 °C/300 m above 900 m (1 °F
per 550 ft).
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