Correct Answer - Option 1 : 200
Designing an efficient Programmable Logic Controller:
PLCs are classified into following the main categories based on the number of input and outputs they can handle:
Nano PLC: PLC that has less than 32 input/output (I/O) functions.
Micro PLC: PLC that has more than 32 Input/Output (I/O) points but not more than 128 input/output (I/O) functions.
Small PLC:
- PLC that has more than 128 Input and Output (I/O) points but not more than 256 I/O functions.
- It does not include any I/O enhancements fitted along with the basic system.
- Hence according to options, the maximum number of inputs and outputs that are there in a small PLC is 200.
Medium and Large PLC: PLC that controls a large number (>256) of discrete elements using very fast input/output (I/O) scan times.