Setup Guide

Getting Started With Your System 13
Environmental (Battery Backup Unit [BBU])
NOTE: For additional information about environmental measurements for specific
system configurations, see dell.com/environmental_datasheets
Maximum input power
• +12 VDC +/–5% at 1 A
• +3.3 VDC +/–5% at 150 mA
• Operating temperature range: 5° to
35°C (41° to 95°F)
Regulated output voltage from BBU • +2.5 VDC +/–3% at 20 mA to 120 mA
• Operating temperature range: 5° to
45°C (41° to 113°F)
Minimum retention time (life
expectancy)
72 hours for 512-MB DDR-I DIMM,
2.5 V at 120 mA
Working temperature range (dry bulb)
• 5° to 35°C (41° to 95°F)
• Maximum dry bulb temperature
derated by 3.3°C (37.9°F) per 1000 m
(3281 ft) above 500 m (1640 ft)
Working relative humidity range 5% to 90% noncondensing
Storage temperature range (dry bulb)
• –10° to 45°C (14° to 113°F) for
3 months maximum
• Maximum dry bulb temperature
derated by 3.3°C (37.9°F, guaranteed)
per 1000 m (3281 ft) above 500 m
(1640 ft)
Transit temperature range (dry bulb) –20° to 60°C (–4° to 140°F) for 1 week
maximum
Storage and transit humidity range 5% to 95% relative humidity
Storage and transit maximum
temperature gradient
1°C (33.8°F) per minute to a maximum
of 20°C (68°F) per hour
Storage and transit maximum humidity
gradient
30% relative humidity per hour