What It Is and Where It Fits
The Omron S82K-03012 is a 30 W power supply unit, listed under PLC expansion modules. It provides the DC rail voltage for Omron PLC racks that need extra capacity for I/O or specialty slices. The 30 W rating covers a handful of low-draw modules — enough for a small local rack but not for a CPU with high-current backplane loads. Mature lifecycle means this model is still in regular production, with a stable supply pattern; it’s a known quantity in the Omron power line.