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Types of Input and Output
❖ Need to ensure the type of supply that willbe connected to the Input Unit
either AC orDC.
❖ It is not allowed to connect the AC supplyto the DC Input unit and vice versa.
❖ While to control the output device at normal switching, it is necessary to use
RELAY type output.
Memory Size
❖ Refers to the ability to store programs in your PLC memory system.
No. Model Memory Size
CQM1-CPU11-E 3.2 K-word Program Memory
1K-word Data Memory
CQM1-CPU21-E
CQM1-CPU41-E
7.2 K-word Program Memory
CQM1-CPU42-E
6K-word Data Memory
CQM1-CPU43-E
CQM1-CPU44-E
Software Language
❖ Each PLC has its own programming language.
❖ Therefore, you need to be careful before developing a PLC program.
❖ For your information, Ladder Diagram is a very popular programming
language used today.
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