Dell E521 specifications Power, Physical, Environmental

	orange light — A good connection exists between a
	100 Mbps network and the computer.
	off (no light) — The computer is not detecting a
	physical connection to the network.
Network activity light (on integrated network	yellow blinking light
adapter)
Power
DC power supply:
Wattage	305 W
Maximum heat dissipation	1041 BTU/hr
	NOTE: Heat dissipation is calculated by using the
	power supply wattage rating.
Voltage (see the safety instructions located in	90 to 135 V and 180 to 265 V at 50/60 Hz
the Product Information Guide for important
voltage setting information)
Backup battery	3-V CR2032 lithium coin cell
Physical
Height	41.4 cm (16.3 inches)
Width	18.8 cm (7.4 inches)
Depth	45.7 cm (18.0 inches)
Weight	12.7 kg (28.0 lb)
Environmental
Temperature:
Operating	10° to 35°C (50° to 95°F)
Storage	–40° to 65°C (–40° to 149°F)
Relative humidity	20% to 80% (noncondensing)
Maximum vibration:
Operating	5 to 350 Hz at 0.0002 G2/Hz
Storage	5 to 500 Hz at 0.001 to 0.01 G2/Hz
Maximum shock:
Operating	40 G +/- 5% with pulse duration of 2 msec +/- 10%
	(equivalent to 20 in/sec [51 cm/sec])
Storage	105 G +/- 5% with pulse duration of 2 msec +/- 10%
	(equivalent to 50 in/sec [127 cm/sec])
Altitude:
Operating	–15.2 to 3048 m (–50 to 10,000 ft)
Storage	–15.2 to 10,668 m (–50 to 35,000 ft)

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