Mundially, PLC modules and Smart relays, unlike a few other PLC Products that come as a Complete system, have really distinct differences in the radial scope of applications due to their functional modules. To elaborate a little further, the former as the name suggests describes a Highly Programmable Controller which can handle multiple control parameters of varying complexities and is useful in large automations. The latter on the other end is a multistage component relay and thus primarily performs lower level functions which the economic aspect is able to achieve in smaller automations. Understanding these differentiation helps businesses make the right selection in chosing which technology would serve them best optimal results.
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