What this 50W DIN-rail supply delivers
The Omron S8FSG05024CD is a 50 W switching power supply that takes 100 to 240 V AC single-phase input and delivers a regulated 24 V DC output at 2.2 A. The 24 V DC rail is the workhorse voltage for PLCs, sensors, relays, and HMI backlighting in industrial control cabinets. 50 W at 2.2 A covers a typical small panel load: a compact PLC plus a handful of I/O modules and indicator lamps, with some headroom for inrush on relay coils.
Single-phase input (100-240 V AC, 47-450 Hz) connects to standard industrial mains. The wide frequency range covers 50/60 Hz grids and higher frequencies found in some genset or UPS outputs. The 2.2 A continuous output at 24 V DC is the figure that governs your load budget. Sum the steady-state draws of everything on the 24 V bus — PLC backplane, input cards, output relay coils, sensor loops — and keep the total under 2.2 A. The supply includes overload and overvoltage protection with automatic reset, so a temporary overload won't latch it off permanently. Hold-up time is specified at a minimum of 10 msec (and 55 msec under typical conditions). That 10 msec floor means the output stays within regulation through a half-cycle dropout on a 50 Hz line — enough for the PLC to ride through a brief sag without a brownout reset. Output ripple and noise is capped at 60 mV maximum. For analog sensor supplies or 4-20 mA loops, that level is clean enough without an external post-filter; for precision measurement circuits, you may still add a small LC filter at the load end. Efficiency reaches 89% at 230 V AC, which keeps heat dissipation inside the aluminum-and-stainless housing manageable. The operating range is -4 °F to 158 °F (-20 °C to 70 °C) — rated for unheated enclosure spaces in temperate climates, but watch the derating curve above 50 °C if the panel runs hot.
The S8FSG05024CD carries cUL, cUR, and UL 508 listing, plus UL 60950-1 recognition for ITE applications. It also meets SEMI F47-0706 voltage sag immunity at 200 V AC input — a requirement for semiconductor fab equipment that must ride through dips without dropping the DC bus.