When a high‑voltage DC bus is already available — from a solar array, a railway traction supply, or an industrial DC micro‑grid — the 6EP1536‑3AA00 steps the voltage down directly to 24 V without the intermediate AC stage of a conventional power supply. It accepts anything from 400 V DC to 800 V DC at its input and delivers a regulated 24 V / 20 A (480 W) on the output side. The input‑to‑output isolation is rated at 4 kV DC, ensuring SELV safety for personnel and connected equipment. With 91 % efficiency and a compact DIN‑rail housing, it fits into panel designs where an extra AC rectifier stage would add cost, heat, and complexity.

High‑Voltage DC Input

• Wide input range (400‑800 V DC): connects directly to the DC link of a photovoltaic inverter, the battery bus of a UPS, or the overhead line supply of a rail vehicle — no step‑down transformer needed.
• Reverse‑polarity protection: the input stage withstands incorrect connection without damage, simplifying commissioning and maintenance.

Reliable 24 V Output

• 480 W at 20 A: runs a complete control system — PLC, HMI, switches, and sensors — from a single converter. Two units can be connected in parallel for 960 W.
• Adjustable voltage: the output can be trimmed from 24 V to 28.8 V to compensate for voltage drop in long cable runs.
• Constant‑current overload protection: limits the current to 1.1‑1.4 × In during a short‑circuit or overload. The output recovers automatically once the fault clears.

Safe Isolation

• 4 kV DC input‑output isolation: provides safe electrical separation between the high‑voltage DC bus and the 24 V control circuit — essential for shock protection and SELV compliance.
• CE and cULus certified: approved for use in European and North American installations.

Technical Specifications