What the S8BA24D24D120LF actually sits down to
The Omron S8BA24D24D120LF is a 24 V DC UPS module in the S8BA series, sized as a DIN-rail buffer unit — a compact battery-backed supply that sits between a 24 VDC panel rail and the load it has to keep alive through a mains disturbance. It is rated 120 W with a 5 A output and a 1.6 Ah internal cell, so the headline figure is roughly 6 minutes at full nameplate load — useful for controlled shutdowns, not for long-duration ride-through.
Ratings in working terms
At 24 V input to 24 V output with a 1.6 Ah battery, the calculation follows directly: a 120 W draw on the output side pulls 5 A through the module, and the internal cell carries that until its stored capacity is consumed — the listed 6 minute backup time is the real number for a BOM line, not a marketing envelope, and derates as the load steps down or as the cells age. Operation spans 0 °C to 55 °C, so it sits in a closed control cabinet rather than on the machine frame next to a motor or inverter; the ambient around the DIN rail needs to clear the upper limit for the battery chemistry to deliver the rated runtime. The RS232, USB, and RJ45 interfaces are all DC UPS management ports — they cover serial and ethernet monitoring, not power output — and the push-in terminal blocks on input and output keep wiring to a single tool, no torque screwdriver required.
Cabinet fit
The enclosure draws 100 mm of depth, 94 mm of width, and 100 mm of height on the DIN rail — narrower than many 24 V power supplies, so it slots alongside circuit breakers and terminals in a standard sub-panel without forcing a width expansion. DIN rail mounting combined with push-in terminals means the panel builder drops it onto the rail, lands the field wiring, and finishes — no stud terminals, no torque documentation pass, and the 24 V pass-through keeps the downstream wiring identical to a non-UPS-fed rail.
Lifecycle and sourcing posture
Omron lists the part at a mature lifecycle stage, with no official successor or cross-reference carried on this order code — the S8BA24D24D120LF remains orderable, but buyers should expect a sourcing conversation rather than a stock-and-ship posture. For a control-cabinet spare or a retrofit, the practical move is to quote the line against an RFQ: same-day dispatch is not the default for a mature-stage DIN UPS, and lot-specific availability is confirmed at quote time.