Programmable Logic Controller (PLC)
A Programmable Logic Controller (PLC) is an industrial control system used to automate various processes and machinery in industries such as manufacturing, food processing, and chemical processing. PLCs are designed to withstand harsh industrial environments and operate in a reliable and consistent manner. PLCs were first introduced in the 1960s as an alternative to traditional relay control systems. Prior to the introduction of PLCs, relay control systems were used to control industrial processes. However, these systems were often cumbersome, difficult to maintain, and required specialized knowledge to operate. PLCs provided a more flexible and efficient way to control industrial processes. A PLC consists of a central processing unit (CPU), input and output modules, and programming software. The CPU is the brains of the PLC and controls the operation of the system. The input modules are used to receive signals from sensors and other devices, while the output modules are used to send s