This category covers Programmable Logic Controller (PLC) main units for automated control of manufacturing lines. We handle PLC main units from major manufacturers including Mitsubishi Electric, OMRON, KEYENCE, and Siemens, supporting a wide range of I/O points from compact to large-scale systems. Standard features include ladder program logic control, timer/counter functions, and communication capabilities to enable production equipment sequence control, process control, and safety control. Input/output modules, programming software, and control panel components are classified separately - this category covers only PLC main units (CPU).