Programmable Logic Controllers (PLCs) are industrial digital computers designed for controlling manufacturing processes, such as assembly lines, robotic devices, or any activity requiring high reliability, ease of programming, and fault diagnosis. PLCs are ruggedized to withstand harsh environments like extreme temperatures, humidity, and electrical noise. Key features include modular design, scalable I/O (Input/Output) options, and support for various communication protocols (e.g., Modbus, Profibus, Ethernet/IP). Common PLC-related products in this category include CPU modules, power supplies, communication modules, analog/digital I/O modules, and programming software. Advanced PLCs may offer motion control, PID loops, and integration with SCADA or HMI systems for enhanced automation capabilities.