Controlling EMI & PLCs
Controlling EMI & PLCs
(OP)
I have heard different recommendations on methods of grounding when it comes to PLCs. What type of fasteners should I use when connecting the equipment grounding conductors to the ground bus? I have heard recommendations for zinc-plated screws and star washers. Can anyone offer a detailed explanation why plated screws should be used?





RE: Controlling EMI & PLCs
Grounding Guidelines".
David Baird
Sr Controls Engineer
RE: Controlling EMI & PLCs
Regarding the use of zinc-plated screws, I believe the plating has to do with anodic corrosion, which occurs at the junction of dis-similar metals - a phenomenon which is probably accelerated by the flow of an electric current through the junction.