Not working extended 32ports board - how to connect

[Kam5]

Dears for this board


I draw my idea on attached picture.

If I understood K COM is main neutral line for each inputs ? It's only 8 pins KCOM - When I want connect all 32 indpendent switches I need to connect 4 wires for 1 Kcom pin or use extended strip for example as below ?



Another question.

I have full shielded metalbox as below


when I placed PLC and this terminal board. I'm afraid about range of signal for 2 remotes controllers.

Could I install on outside this box 2 externall antennas for example like this below?
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Maybe You have better idea how to extend the antenna for outside metal box.



Thank You for answer and ideas.