Product Overview

The 6EP1933-2EC41​ is a Siemens SITOP UPS500S basic-unit DC uninterruptible power supply, designed to sit downstream of a 24 V DC stabilized PSU (typically a SITOP PSU100M/PSU200M/PSU300S) and provide controlled, maintenance-free ride-through when the upstream mains fails. Where traditional DC-UPS relies on lead-acid or Li-ion batteries—with their 3–5 year replacement cycle, temperature sensitivity, and ventilation requirement—the 6EP1933-2EC41​ uses double-layer supercapacitors as the energy store, giving a service life that tracks the cabinet’s own lifecycle (>10 years typical) with zero scheduled maintenance. The rated envelope is 24 V DC input (22–29 V range) from the host PSU, 24 V DC / 15 A output (360 W continuous, peak 25 A), and a base energy budget of 2.5 kWs, which the module trades against load current: 15 A for ≈3 s, 10 A for ≈6 s, 5 A for ≈15 s, 2 A for ≈38 s, with longer buffering available by daisy-chaining SITOP UPS501S expansion modules up to 20 kWs total.What makes the 6EP1933-2EC41​ distinctive in the SITOP portfolio is not just the capacitor choice but the configurability layered on top. A USB Type-B interface connects to a PC running SITOP select software (or to a USB-host-capable SIMATIC PLC) for parameter download, buffer-threshold setting, remaining-time calculation, event logging, and capacitor-age monitoring—features that turn the module from a dumb ride-through brick into a diagnosable asset on the cabinet roster. The buffer-in threshold is adjustable 22–25.5 V DC in 0.5 V steps, so plants can tune exactly when the 6EP1933-2EC41​ clips over to supercap supply—tight for PC-based controllers that need a clean shutdown window, looser for pure-PLC racks that just need to hold retentive data through a mains blink. At 97.5 % efficiency (typical, full load) and 9 W loss at 15 A, the module runs cool enough for natural convection across its 0–60 °C operating band, and at 120 × 125 × 125 mm / 1 kg it snaps onto a 35 mm DIN rail (EN 60715) with 50 mm clearance top and bottom, no fans, no vents, IP20 for cabinet-only.Certifications cover the usual SITOP spread—CE, cULus (UL 508 / CSA C22.2 No. 107.1, File E197259), EAC, and marine (ABS, DNV)—so the 6EP1933-2EC41​ lands in North American machinery panels, European process cabinets, and offshore/marine enclosures without re-certification drama. Siemens lists it PLM “Active” in Industry Mall, though standard lead time has stretched to ≈100 days in recent allocations, which is why the 6EP1933-2EC41 is increasingly stocked as a strategic spare by system houses and plant maintenance teams rather than ordered ad-hoc.

Technical Specifications