Appendix B. Operating environment  341
ň° Maximum wet bulb: 28 degrees C
ň° Maximum altitude: 3050 m (10,000 ft.)
 
ň° Wet bulb (caloric value): 1,724 Btu/hr (fully loaded shelf) 
ň° Maximum electrical power: 100 - 240VAC, 12-5.9 A
ň° Nominal electrical power:
â 100 - 120VAC, 3.6 A; 
â 200 - 240VAC 1.9 A, 50/60 Hz 
ň° Noise level: 6.4 bels @ 1 m @ 23 degrees C 
EXN4000
The EXN4000 FC expansion unit features the following physical specifications:
ň° Width: 447 mm (17.6 in)
ň° Depth: 508 mm (20.0 in)
ň° Height: 133 mm (2.25 in)
ň° Weight: 35.8 kg (78.8 lb) 
The EXN4000 FC expansion unit features the following operating environment specifications:
ň° Temperature:
â Maximum range: 10° - 40° C (50° - 104° F)
â Recommended: 20° - 25° C (68° - 77° F)
â Non-operating: -40° - 65° C (-40° - 149° F) 
ň° Relative humidity: 10 - 90% (non-condensing)
ň° Wet bulb (caloric value): 1,215 Btu/hr (fully loaded shelf)
ň° Electrical power: 100 - 120/200 - 240 V ac, 7 - 3.5 A, 50 - 60 Hz
ň° Noise level:
â 49 dBa @ 1 m @ 23 degrees C
â 5 bels @ 1 m @ 23 degrees C 
Warning: Operating at environmental extremes can increase failure probability.