Power supplies and power modules provide regulated electrical power for PLC, DCS, I/O, communication, monitoring, and control-system hardware. Their architecture can include AC/DC conversion stages, DC/DC conversion, filtering, regulation, current limiting, protection circuits, redundancy functions, status indication, and power-distribution connections. The category covers rack power supplies, DIN-rail supplies, system power modules, converters, UPS controllers, and distribution assemblies. Key technical characteristics include input voltage range, output voltage, rated current, power capacity, efficiency, isolation, redundancy support, protection behavior, and mounting format. Functionally, these components convert available plant power into stable voltages required by control electronics and field interfaces. Correct replacement requires matching the original electrical ratings, connector arrangement, mechanical format, redundancy configuration, and compatibility with the installed automation platform.
