This category encompasses PLC (Programmable Logic Controller) main units and basic units that serve as the core of automated control systems in manufacturing lines. It includes CPU units, base units, and power supply units from major manufacturers such as Mitsubishi Electric, OMRON, KEYENCE, and Siemens. These central processing units perform operational control, sequence control, and process control of production equipment, and are combined with input/output modules and communication units to construct FA control systems. Control programs can be created and edited using programming software, enabling automation and efficiency improvements in manufacturing processes. Input/output modules, communication units, and programming software are classified separately.