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I have an application where the area is class 1 div 2 group C and D. I will be using type Z purge on the main controller. I have to wire from the main contoller out to valve position/limit switches and then back to the PLC input in the main controller. The switches on the valves are rated for the area.
Is it better/safer to use 24Vdc or 24 vac or 120 Vac or doesn't it matter? Thanks.
Is it better/safer to use 24Vdc or 24 vac or 120 Vac or doesn't it matter? Thanks.