The system for to read Thermical sensors.
You need on central box JT121 for each Thermical sensor. Gives you an Electric output signal to control other systems.
Lights indicate the functions, so good to assemble into a ATEX box with plexi, to be able to reed lights through the cover.
This central is NOT ATEX approved, so it need to be assembled into a box, or outside of dangerous area.
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