5
Environmental Specifications
• When using any of the PL’s optional devices, be sure to check that device’s specifica-
tions for any special conditions or cautions that may apply to its use.
• Be aware that not only does the Hard Disk have a fixed lifetime, but that accidents
can always occur. Therefore, be sure to back up your Hard Disk’s data regularly, or
prepare another Hard Disk unit that can be used for backup.
• The Hard Disk lifetime given here may be reduced due to unforeseen environmental
factors, however, generally speaking, the disk should last for 20,000 hours (of opera-
tion) or approximately 5 years, whichever comes first at an operating temperature of
20°C and 333 hours of operation per month. (HDD access frequency of 20% or less)
• Using the Hard Disk in an environment that is excessively hot and/or humid will
shorten the disk’s usage lifetime. A wet bulb temperature of 29°C or less is recom-
mended. This is equivalent to the following data.
• In order to extend the lifetime of the hard disk, Pro-face recommends you set the
Windows
®
2000’s [Control panel]-[Power Management option]-[Turn off hard disks]
selection or the Windows
®
XP’s [Control panel]-[Performance and Maintenance]-
*1 When the total of the expansion slot power and the external load power exceeds 15W, the length of
the allowable voltage drop will be 20ms or less. For details, refer to the chart below.
Phy
s
ic
al
Surrounding Air
Temperature
0 to 50
°
C :without HDD
5 to 50
°
C :with HDD
Storage Temperature -20 to +60°C
Ambient Humidity
10 to 90% RH (Not condensing, wet bulb temperature: 39°C or
less. Wet bulb temperature with HDD: 29°C or less.)
Storage Humidity
10 to 90% RH (Not condensing, wet bulb temperature:39°C or less.)
Dust
Free of dust
Pollution Degree
For use in Pollution Degree 2 environment
Temperature
at 35°C
at 40°C
Humidity
no higher than 64% RH
no higher than 44% RH
(ms)
20
14
0
35
40 (W)
15
Allowable Range
