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FX1N Series Programmable Controllers Installation Notes 3.
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3.8.3 Extension I/O module and Special Function module
Install/remove extension module as shown in the figure below.
Caution
Cut off all phases of power source before installing/removing the extension module.
Ref. Description
1 Remove the extension bus cover.
2 or 2'
2: Install extension cable.
2': Remove extension cable.
3 Install the extension bus cover.
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2 ’