Does the module's output correspond correctly to its input? Determine that by forcing the PLC output to 10%, 25%, 50%, 75%, and 90% and measuring on the output terminals at the corresponding range.
Some common pitfalls in machine safety have to do with not wiring devices correctly. Many devices today can cover a range of safety levels, such as SIL 1 through SIL 3, but have different wiring ...
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