Dell OptiPlex 745 - Manual (Page 115)

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Controls and Lights
Power control push button
Power light green light — blinking green indicates sleep mode;
solid green indicates power-on state.
amber light — blinking amber indicates a problem
with an installed device; solid amber indicates an
internal power problem (see
Power Problems ).
Hard-drive access light green
Link light solid green light indicates network connection
Link integrity light (on integrated network adapter) green light for 10-Mb operation; orange light for 100-
Mb operation; yellow light for a 1000-Mb (1-Gb)
operation
Activity light (on integrated network adapter) yellow blinking light
Diagnostic lights Four lights on the front panel. See Diagnostic Lights .
Standby power light AUX_PWR on the system board
Power
DC power supply:
NOTE: Power consumption can be zero when the
computer is unplugged.
Wattage 305 W
Heat dissipation 1041 BTU/hr
NOTE: Heat dissipation is calculated based upon the
power supply rating.
Voltage manual selection power supplies—90 to 135 V at 60
Hz; 180 to 265 V at 50 Hz
Backup battery 3-V CR2032 lithium coin cell
Physical
Height 41.4 cm (16.3 inches)
Width 18.5 cm (7.3 inches)
Depth 43.9 cm (17.3 inches)
Weight 12.34 kg (27.2 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 0.25 G at 3 to 200 Hz at 0.5 octave/min
Storage 0.5 G at 3 to 200 Hz at 1 octave/min
Maximum shock:
Operating bottom half-sine pulse with a change in velocity of
50.8 cm/sec (20 inches/sec)
Storage 27-G faired square wave with a velocity change of
508 cm/sec (200 inches/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)