LevelOne POW-4822 Industrial DIN-Rail Power Supply 48V DC 75W for PoE Switches, Wide-Temp -20 to 70°C, DC OK Relay

The LevelOne POW-4822 is an industrial 48 V DC power supply rated at 75 W (1.6 A) that clips onto a standard 35 mm DIN rail, made for control cabinets that power switches, controllers and sensors. 48 V DC is the input voltage of most industrial PoE switches and media converters, and the universal 90–264 V AC input (or 127–370 V DC) means the same unit works on any mains supply.

It is fanless and cooled by free air convection, so there is nothing to wear out or clog with dust, and it carries short-circuit, overload and over-voltage protection. The output can be trimmed from 48–55 V to compensate for voltage drop on longer cable runs. It is rated for -20 to 70 °C, can carry 104 % of full load, and each unit is burn-in tested.

• LevelOne POW-4822 DIN-rail power supply

• Mount it on the same 35 mm DIN rail as your industrial switch or controller and wire mains (L/N/PE) and the DC output to the screw terminals — no separate enclosure needed inside a cabinet.
• Size it with headroom: add up the maximum consumption of everything on the 48 V bus and keep it comfortably below 75 W.
• Use the voltage trim (48–55 V) to bring the voltage at the far end of a long DC run back to nominal.
• The DC OK relay lets a PLC or alarm input see immediately if the output fails.

• It has no mains cable or plug — it must be wired into terminals by a qualified electrician inside a cabinet.
• A 75 W supply is not enough for a fully loaded PoE switch: the PoE budget your switch can deliver is limited by this supply, minus the switch's own consumption.
• It is not a UPS: if mains power fails, the output drops after the short hold-up time.
• It is not rated for outdoor exposure on its own; install it inside a closed cabinet.