
PLCs or Programmable Logic Controllers are generally the commercial or industrial computers used to operate automated systems. From traffic lights on streets to roller coasters at parks, PLCs are seen everywhere. To make PLC work, three major components are required, namely, the Central Processing Unit (CPU), the power supply and rack, and the I/O section. The two main categories of PLC are fixed and modular PLCs. Modular PLC (Programmable Logic Controller) is preferred over fixed PLC owing to its capability to execute complex processes. Furthermore, modular PLCs are also called rack-mounted units, consisting of bases for installation of various I/O modules, which are easier to repair. Capability to store more information, greater number of available I/O modules, designed to expand and customize processes for continuous development and greater economic security for long-term are some of the benefits, which are expected to be the factors for the market growth. Based on product type, micro modular PLC is expected to dominate the global modular PLC market.