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• Momentary power failure may be detected or the CPU module may be reset due to serge caused by
lightning.
As measures against a noise caused by surge, connect a surge absorber for lightning as shown in the
following figure.
Using the surge absorber for lightning can reduce the influence of lightning.
• Use an online UPS (uninterruptible power supply) with power distortion factor of 5% or less or line-interactive
UPS. For a standby system UPS, use Mitsubishi small-capacity UPS "FREQUPS FW-F series" (hereafter
abbreviated as FW-F series).
*1
(Example: FWF10-0.3K/0.5K)
Do not use any standby system UPS other than the FW-F series.
*1 Use a FW-F series UPS with the serial number starts with P or later or ends with HE.
● Separate the ground of the surge absorber for lightning (E1) from that of the programmable controller (E2).
● Select a surge absorber for lightning whose power supply voltage does no exceed the maximum allowable circuit voltage
even at the time of maximum power supply voltage elevation.
AC
E1
E2
Surge absorber for lightning
Programmable
controller
I/O equipment
Starts with "P" or later
Ends with "HE"
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