4. Installation Specifications
4-7
TI 32P01J10-01EN
Durability of Parts
Some hardware components require periodical replacement. As a guideline to the intervals
between preventive maintenance checks, the following table lists components with life span of
less than 10 years. Users should replace the components indicated by a cross mark X during the
preventive maintenance check. For other components, users should not attempt to replace them;
contact Yokogawa for replacement.
Note: Random failures within the recommended replacement intervals may occur in some parts.
IMPORTANT
Parts reliability and durability depends much on environment in which they are used. Even within
a range of environmental requirements, it is still important to be used in “desirable environment”
to enhance reliable operation and durability.
For example, when a device whose temperature range is 5-40 degrees centigrade is used
always in 35 degrees centigrade, its estimated failure rate is generally almost doubled and
durability decreases by almost half, compared to the same device used in 25 degrees centigrade.
If there are corrosive gases; moreover, they promote corrosion of contact parts and printed circuit
boards and their durability is shortened, compared to those in cleaner atmosphere. If there is
more dust; in addition, we have to shorten the cleaning and replacement cycle for filters.
C
ontrol Devices (S2SC70
, SSC60
, SSC50
, SSC57
, and SNB10D)
Component
Part
number
Recommended
replacement
period
Replacement
by user
Remarks
Power Supply Module
(100-120 V AC power supply)
SPW481
8 years
X
Average ambient temperature of
40ºC or lower
Power Supply Module
(220-240 V AC power supply)
SPW482
8 years
X
Average ambient temperature of
40ºC or lower
Power Supply Module
(24 V DC power supply)
SPW484
8 years
X
Average ambient temperature of
40ºC or lower
Battery Pack
S9185FA
3 years
X
Average ambient temperature of
30ºC or lower (*1)
1.5 years
X
Average ambient temperature of
40ºC or lower (*1)
9 months
X
Average ambient temperature of
50ºC or lower (*1)
Aluminum Electrolytic
Capacitor
–
8 year
–
For SPW481, SPW482, and
SPW484 power supply modules
and power supply units for fan units
(S9159FA and S9160FA)
Average ambient temperature of
40ºC or lower
Built-in Fuse
S9109VK
8 years
–
For SPW481 power supply module
S9109VK
8 years
–
For SPW482 power supply module
A1546EF
8 years
–
For SPW484 power supply module
Fan Unit
AIP602
4 years
X
Average ambient temperature of
60ºC or lower
A1159EM 4 years
X
Fan only
Average ambient temperature of
60ºC or lower
X:
Can be replaced.
–:
Cannot be replaced.
*1:
Including temperature during storage.
Oct. 25, 2016-00
