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State THREE differences of a relay control system in comparison to PLC control systems - NSC Electrical Technology Power Systems - Question 6 - 2019 - Paper 1
Question 6
State THREE differences of a relay control system in comparison to PLC control systems. 1. Relays require regular maintenance and repair. 2. Relays use much more en... show full transcript
Worked Solution & Example Answer:State THREE differences of a relay control system in comparison to PLC control systems - NSC Electrical Technology Power Systems - Question 6 - 2019 - Paper 1
Step 1
State THREE differences of a relay control system in comparison to PLC control systems.
Answer
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Maintenance: Relay systems require regular maintenance and repair, whereas PLC systems are generally more reliable and require less frequent maintenance.
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Energy Use: Relay systems utilize much more energy than PLC systems, making PLCs a more energy-efficient option.
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Size and Space: Relay systems take up more physical space compared to PLCs, which can be more compact and integrated.