-3-
• The PL-HD240 has a finite usage lifetime. Therefore, be sure to back
up all HDD data periodically or prepare a backup HDD unit.
• The Hard Disk lifetime specified here may be reduced due to unfore-
seen environmental factors, however, the disk should operate for
20,000 hours or approximately 5 years, whichever comes first, at an
operating temperature of 20
o
C and approximately 333 hours of opera-
tion per month. (HDD access frequency of 20% or less)
• When using a PL optional unit, be sure to check that unit’s specifica-
tions for any special conditions or cautions that may apply to its use.
• Since the PL unit’s hard disk drive (HDD) is a consumable item, i.e. it
has a limited lifetime, be sure to back up its data regularly and prepare
a spare HDD unit.
• Using the Hard Disk in an environment that is excessively hot and/or
humid will shorten the disk’s operation life. A wet bulb temperature of
29
o
C or less is recommended, which is equivalent to the following
data.
Temperature
Humidity
at 35
0
C
no higher than 64%
at 40
0
C
no higher than 44%
Environment
Surrounding Air
Temperature
5
o
C to 50
o
C
Storage Temperature
-10
o
C to +60
o
C
Ambient Humidity
10%RH to 85%RH (no condensation,
Wet bulb temperature: 29
o
C or less)
Noise Resistance
Noise Voltage: 1500Vp-p
(via Noise Simulator)
Pulse Width: 50ns, 500ns, 1
µ
s
Electrostatic Discharge
Immunity
4kV
Vibration Resistance
4.9m/s
2
(10Hz to 25Hz) (When Operating)
Shock Resistance
3920m/s
2
(1ms, Half-sine shock pulse)
