Dell Dimension E521 - Manual (Page 52)

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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
adapter) yellow blinking light
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
the Product Information Guide for important
voltage setting information) 90 to 135 V and 180 to 265 V at 50/60 Hz
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 G 2 /Hz
Storage 5 to 500 Hz at 0.001 to 0.01 G 2 /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)