Filter
Top Products
9 - 6
(7) Spare product
Table 9.3 Spare products
Product name Quantity Remark
1 Battery One or two
Storage lives of lithium batteries are about five years.
Therefore, the stock should not be kept all the time but
batteries should be purchased when required. However,
keep stock of one or two for accidental situation.
2 I/O module
One per each
module type
Note that I/O modules tend to be faulty during a test
operation.
Also note that the contacts of output modules are
consumed in long-term use.
3 CPU module
One for each
used model
4 Memory card
One for each
used model
CPU modules and memory cards are the core parts of a
programmable controller, which means that an error of
them result in the system down.
5
Power supply
module
One for each
used model
Same as above. As the temperature of the power supply
modules rises easily, and high ambient temperature ma
y
shorten their service lives.