DIN-rail power supplies convert AC line power to the regulated DC that PLCs, sensors and relays run on — most often 24V DC. Replacing one is straightforward if you match the output to the load.
Match the output first
- Output voltage: usually 24V DC (also 12V, 48V). It must match your control system.
- Output current / wattage: meet or exceed the original — e.g. 24V at 10A = 240W. Sizing up gives headroom; never size down.
- Regulated output and low ripple for sensitive electronics.
Match the input and form factor
- Input voltage: single-phase 100–240V AC (most common) or three-phase 400/480V AC for larger units.
- DIN-rail (35 mm) mounting and the physical width in your panel.
- Operating temperature range for the cabinet environment.
Features the old unit may have relied on
- Power Boost: brief extra current to start loads or trip breakers.
- Redundancy / parallel operation (with a redundancy module) for critical systems.
- DC-OK signal or relay contact used by the control logic.
We'll match it
Supplies from Phoenix Contact, Siemens SITOP, PULS, Mean Well and ABB are widely interchangeable when output, input and width match. Send us the part number or the output rating, and we'll quote a suitable replacement.