Table 26. Ambient temperature and humidity (continued)
Specication Temperature range Relative humidity
Non-operating -40º C to +70º C (-40º F to +158º
F) (Max rate of change: 20º C)
-12º C DP/5 to 100% (Max)
(Non-condensing)
Specication Measurement/description
Airflow System must be operated with low pressure rear
exhaust installation.
Back pressure created by rack doors and obstacles
not to exceed 5 Pa (0.5 mm H
2
O)
Altitude, operating -100 to 3,048 meters (0 to 10,000 feet). Maximum
operating temperature is de-rated by 1º C for each
300 m above 900 m (2952.76 feet)
Altitude, non-operating -100 to 12,192 m (-328 to 40,000 feet)
Shock, operating 3.0 g, 11 ms (per axis)
Shock, non-operating 20.0 g, 7 ms, 10 shock pulses (2 shocks per axis X,
Y in positive and negative direction, and 2 shocks in
positive Z axis) OR ISTA 3H (mounted in a rack,
horizontal impact on all sides, 4-in drop tests)
Vibration, operating 0.18 G
rms
5Hz to 500 Hz, 30 min per axis
Vibration, non-operating 0.54 G
rms
6Hz to 200 Hz (ISTA 3E)
Vibration, relocation ISTA3H air ride for 60 min
Acoustics 4U enclosures: Sound power operating £ 8.5 Bels
LW
Ad
@23ºC
Orientation and mounting:
• Rack rails
• Rack characteristics
1.2 m rack mount (4 EIA units)
To t 1.2 m depth racks compliant with the SSI
server rack specication
Back pressure not exceeding 5 Pa (~0.5 mm
H
2
0)
Power supply unit specications
Table 27. Power cooling module
specications
Specication Measurement/description
Dimensions 38.1 mm high x 169.9 mm wide x 211.1 mm long:
• X-axis length: 169.9 mm (6.69 in)
• Y-axis length: 38.1 mm (1.5 in)
• Z-axis length: 211.1 mm (8.3 in)
Maximum output power 2000 W
Voltage range 200–240 VAC rated
Frequency 50–60 Hz
Voltage range selection Auto-ranging: 90–264 VAC, 47–63 Hz
72 IBM Cloud Object Storage System: Medium/Large J11/J12 Disk Enclosure Hardware Installation and
Maintenance Manual
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