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Expanding the functionality of a PLC (Programmable Logic Controller) is often done through expansion modules. These modules are designed to provide additional features such as digital or analog inputs and outputs, network communication, and other advanced control functions.
There are a range of different types of expansion modules, including:
Digital input (DI) module: Used to read signals from sensors and devices into the PLC system.
Digital Output Module (DO): Allows the PLC to control devices such as motors, valves, lights, etc.
Analog input module (AI): Used to measure analog signals such as temperature, pressure, level, etc.
Analog output module (AO): Allows the PLC to generate analog signals to control devices such as control valves or inverters.
Network communication module: To connect the PLC to other devices, SCADA systems, or other PLC networks.
By adding these modules, PLC programmers can expand the system's functionality, allowing it to perform more complex control functions and integrate with other devices in a large automation system. than
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