The Siemens 6EP1334-2BA01 is a SITOP PSU100M power supply delivering a nominal 24 V DC output at 2.5 A, fed from a single-phase AC line. It accepts 120 V or 230 V input (selectable via the two rated ranges: 85–132 V AC and 170–264 V AC) at 47–63 Hz. The output voltage is adjustable from 22.8 V to 28 V via a trim pot, which is useful for compensating line drops or matching a specific load voltage tolerance. The unit snaps onto a standard DIN rail per EN 60715 (35×7.5/15 mm profile) — no drilling, no backplate. Clearance requirements: 50 mm above and 50 mm below for natural convection cooling; zero clearance on the left and right sides, so it can be packed tight against adjacent modules. A green LED on the front panel indicates 24 V OK — useful for a quick visual check during commissioning or fault isolation. The startup delay is under 0.1 s, and the typical voltage rise time is 50 ms, so downstream loads see a clean power-up sequence.
Sourcing and lifecycle — active, quoted to order
Approvals include CE marking and marine type approvals from ABS and GL, so it is accepted in European and maritime installations. The unit is Class I (protective earth required) and carries CB certification. EMC compliance covers both emission (EN 55022 Class B) and immunity (EN 61000-6-2), making it suitable for residential and light-industrial environments without external filtering.
Integration notes — wiring and thermal
The 50 mm top and bottom clearance is mandatory for natural convection; if the panel has forced airflow, you may reduce it, but the datasheet ratings assume free air. Ambient operating range is 0–60 °C, storage/transport from –40 to +85 °C. MTBF at 40 °C is 1,443,606 hours — roughly 165 years, which is typical for a well-designed industrial supply and gives confidence for long-life installations.
Protection and behavior under fault
Current limitation is set at 12.5–13.5 A, meaning the supply will fold back rather than shut down on overload — it can start capacitive loads or drive short-duration inrush without nuisance tripping. The maximum I²t is 3.3 A²·s, which helps with fuse coordination downstream. On/off behavior shows a 4% overshoot on the output voltage, within acceptable limits for most 24 V loads. Mains buffering is specified at 93 V and 187 V input — the hold-up time is not given numerically, but the unit is designed to ride through brief line dips. Galvanic isolation provides SELV output per EN 60950-1 and EN 50178, so it is safe for direct connection to control circuits and touch-safe terminals.