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Why PLC AI (Analogue Input) signals comes in low BITs input. i.e. 8 X 12 BIT and
PLC AO (Analogue Output) signals goes in high BITs output. i.e. 4 X 16 BIT
What type of PLC? AB PLC5???
I 've seen in A-B & Siemens PLCs too. But especially SIEMENS S7 300 PLCs