2104 Model DU3 Expandable Storage Plus 
 
Dimensions             
Height     128 mm  5 in.    
         (3 EIA units)    
Width     447 mm  17.6 in.    
Depth     563 mm  22.2 in.    
Weight¹             
Minimum     22 kg  49 lbs.    
Maximum     36 kg  80 lbs.    
Electrical (For each drawer)    
Power source loading  N/A 
Voltage range (V ac)  100 to 240 
Frequency (hertz)  50 to 60 
Thermal output (Maximum)  1126 Btu/hr 
Power Requirements (Maximum)  330 watts 
Power factor  not less than 0.95 at 50% maximum load 
Inrush current  40 amps 
Maximum altitude  2133 m (7000 ft.) 
Temperature Requirements²  Operating
10 to 40°C
(50 to 104°F)
 
Non-Operating
10 to 52°C
(50 to 125°F)
 
Humidity Requirements  Operating  Non-Operating 
(Noncondensing)  8% to 80%  8% to 80% 
Wet Bulb  27°C (80°F)  27°C (80°F) 
Noise Emissions¹  Operating  Idle 
L
WAd 
6.5 bels  6.1 bels 
L
pAm 
N/A  N/A 
<L
pA
>
m 
N/A  N/A 
Impulsive or prominent discrete tones  N/A  N/A 
Clearances  Front  Back  Left  Right 
Install/Air Flow²  1140 mm(45 in)  810 mm (32 in)  N/A  N/A 
Service  1140 mm(45 in)  810 mm (32 in)  When mounted in 
a rack 
  
1.    See “Noise Emission Notes” on page 336 for definitions of noise emissions positions. 
2.    The recommended operating temperature is 22°C (72°F) or lower. At lower temperatures, the risk of failure in the 
unit is reduced. If the operating temperature is above 22°C (72°F) for long periods of time, the unit will be 
exposed to a greater risk of failure from external causes.
 
 
 
 
Chapter 5. Physical Characteristics of the 2100 Series  235