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10.6 Wiring
10.6.1 The precautions on the wiring
10
LOADING AND INSTALLATION
• Momentary power failure may be detected or the CPU module may be reset due
to serge caused by lightening.
As measures against serge caused by lightening, connect a surge absorber for
lightening as shown in Diagram 10.39.
Using the surge absorber for lightening can reduce the influence of lightening.
POINT
1. Separate the ground of the surge absorber for lightening (E1) from that of the
programmable controller (E2).
2. Select a surge absorber for lightening whose power supply voltage does no
exceed the maximum allowable circuit voltage even at the time of maximum
power supply voltage elevation.
Diagram 10.39 Connecting a lightning surge absorber
E1 E1
AC
E1
E2
Surge absorber for lightening
Programmable
controller
I/O devices
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