Automation System
Programmable controllers:

are programmed using relay ladder logic
(a) and (c) above
None of these
cannot perform functions other than relay logic
are widely used in many different industries

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Automation System
D/A (digital to analog) conversion:

must be fed through a filter to reproduce the original signal accurately
results in a binary code as the final output
has to be sampled at 1/2 the highest input frequency
both (b) and (c)
None of these

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