Controllers / PLCs

Controllers / PLCs is a broad category covering the programmable logic controllers, I/O modules, and associated termination and expansion hardware that form the backbone of industrial control systems. Controls engineers, machine builders, and panel integrators will find a range of products here spanning compact micro PLCs suited for stand-alone machine control, modular mid-range systems supporting distributed I/O architectures, and high-availability redundant controller platforms designed for continuous-process and safety-critical applications. Supporting hardware — including digital and analog termination assemblies, terminal base units, and I/O expander blocks — enables flexible field wiring and simplified maintenance in both simplex and duplex configurations. Whether specifying a new PLC for a discrete manufacturing line, expanding an existing rack with additional I/O points, or sourcing replacement termination assemblies for a distributed control network, this category supports PLC selection, I/O system design, and industrial automation retrofits across a wide range of voltage classes and communication protocols.