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What are the differences between plc solution and relay ladder logic solution?
Wiki User
∙ 11y ago
All the symbols in the relay logic represent actual components and contacts present in the system, but the inputs\outputinstructionin PLC ladder logic represent only data values stored in the PLC memory.
Wiki User
∙ 11y ago
Wiki User
∙ 8y agorelay coils are driven by current and PLC logic levels are voltages
relay coils typically get quite warm from this current flow when held a long time but as most PLCs are CMOS they do not heat up when held, instead they heat up when switched rapidly
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