A remote terminal unit (RTU) is an industrial device that can be used to collect and process data from sensors, actuators, and other devices. It may have a built-in microprocessor or a programmable logic controller (PLC) that can be programmed like a computer.
A remote terminal unit is used in many industries to control and monitor industrial equipment. It can be used to monitor the operation of machines, record data from them and send commands to them. They are a vital component of a supervisory control and data acquisition (SCADA) system. Here are a few examples of where RTUs are used:
A remote terminal unit (RTU) is a computer, while a programmable logic controller (PLC) is not. An RTU can be used to perform process monitoring and control functions and collect data from sensors within a plant or facility. A PLC has no operating system or display; it only accepts instructions from another device, such as an RTU, which tells the PLC what to do based on those instructions.
Let's take an example of an RTU at a water treatment plant. The RTU is installed at different points within the treatment plant and throughout the distribution network. For instance, an RTU may be installed at a pumping station. The RTU interfaces with various sensors and actuators at the station. It collects data from the sensors, which might measure parameters like water flow rate, pressure, and water quality. It can also control the actuators by turning pumps on or off or adjusting valve positions.
If, for instance, the pressure in a section of the distribution network drops below a certain level, the RTU at the corresponding pumping station can be commanded to turn on a pump to increase the pressure. Sensors connected to the RTU could include flow meters, pressure sensors, and water quality sensors that measure parameters like pH, turbidity (cloudiness), and disinfectant levels.
Remote terminal units (RTUs) offer several benefits, especially for industries where monitoring and controlling operations at remote or distributed sites are critical. Here are some of the key benefits:
Remote terminal units can monitor and control various physical processes, such as temperature, flow rate, and pressure. They're incredibly beneficial for remote control monitoring and help improve safety when someone cannot physically visit a site to operate and check equipment.
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