Remote Telemetry Units (RTUs) and programmable logic controllers (PLCs) both perform the same basic function: remote alarm monitoring and control of remote equipment. How they go about doing that job, however, varies significantly. This makes RTUs better for some environments and PLCs better for others. In this tutorial, I'll help you understand these differences and how they apply to your project.
Which monitoring device you choose is perhaps most heavily related to your industry. There are no guarantees that a certain industry will be best served by an RTU or PLC, but this tendency exists because each industry has common structures and procedures.
For example, PLCs are generally found to be quite useful in manufacturing environment, thanks to the following characteristics:
Similarly, RTUs are commonly associated with their own set of industries. They are generally deployed into industrial telecom networks (used by telecommunications companies of all kinds, transportation companies like railroads, government entities like police and fire departments, and others as well). Again, there are several reasons why this RTU preference exists:
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