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PLCis used to control the system without human power and RTU is used to control and monitor the wide range
Let Me give here a simple example to explain the concept of RTU and PLC... if you are talking to someone who is far away via a media(radio, internet, WAN etc) and asking what he is doing(monitoring) or asking to do something(Control Commands). The person here is RTU and the brain of that person is PLC.. hope guys here understood... Thanks
RTUs are considered more suitable for wider geographical telemetry, the reason being that RTUs use wireless communication; PLCs are more suitable for local control, for example, for assembly lines in factories, light fixtures, amusement rides, etc. PLCs are specially designed for output arrangements and multiple inputs. They have electrical noise immunity, vibration and impact resistance, varied temperature ranges
