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22 FX3U-32BL (Battery)
22.3 Battery Handling
FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
22.2.1 Differences between main unit’s internal battery and the optional battery
Although the optional battery (FX3U-32BL) serves as the same as the main unit’s internal battery, they differ in
the ways described below.
They may also have different external colors based on the time of manufacture.
22.3 Battery Handling
When the battery voltage is low, a "BATT" LED is lit (red) while the power is ON, and M8005 and M8006 are
switches ON.
Although the battery will continue to function for approximately 1 month after the "BATT" LED switches ON, a
replacement battery should be ordered and installed as soon as possible.
22.3.1 Battery life & replacement guidelines
FX3U-32BL battery life : Approx. 5 years (ambient temperature :
25°C(77°F))
The life of the battery changes with respect to ambient temperature.
When planning for battery replacement, please estimate the battery life
according to the graph to the right and order replacement batteries in
advance.
22.3.2 Reading the date of manufacture
1. Reading the optional battery’s lot No. (reference)
Batteries with affixed nameplate labels are optional batteries.
Main Unit Internal Battery Optional Battery (Spare)
External
appearance
A nameplate label with the product model and lot
No. is affixed.
Connector
0
4
1
0
0
1
0
4
1
0
0
1
Connecto
FX
3U
-32BL
LOT.101
Nameplate
............
Battery Life(years)
Ambient temperature(°C)
Battery life vs. temperature
FX
3U
-32BL
LOT.101
Connector
Nameplate
............
<Product during December, 2009 or earlier>
9Z 101
Year (Example: 2010)
Last two digit of year
Month (Example: Jan):
1 to 9 = Jan to Sept,
X = Oct, Y = Nov, Z = Dec
Year (Example: 2009)
Last digit of year
<Product from January, 2010>
Month (Example: Dec):
1 to 9 = Jan to Sept,
X = Oct, Y = Nov, Z = Dec
Model name
LOT
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