Device Overview

(5) Power on/off sequence

The voltage detector circuits (the MHE Series and MHF Series) monitor +5 V. The circuits do not allow a write signal if either voltage is abnormal. These prevent data from being destroyed and eliminates the need to be concerned with the power on/off sequence.

1.4 Environmental Specifications

Table 1.6 lists the environmental specifications.

 

Table 1.6

Environmental specifications

 

 

 

 

Item

 

 

Specification

 

 

 

Temperature

 

 

Operating

 

5°C to 55°C (ambient)

 

 

 

5°C to 60°C (disk enclosure surface)

Non-operating

 

–40°C to 65°C

Thermal Gradient

 

20°C/h or less

 

 

 

Humidity

 

 

Operating

 

8% to 90% RH (Non-condensing)

Non-operating

 

5% to 95% RH (Non-condensing)

Maximum Wet Bulb

 

29°C

 

 

 

Altitude (relative to sea level)

 

 

Operating

 

–300 to 3,000 m

Non-operating

 

–300 to 12,000 m

 

 

 

 

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C141-E057-01EN

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Fujitsu MHE2043AT, MHF2043AT, MHF2021AT, MHE2064AT manual Environmental Specifications, Environmental specifications