5WG11251AB23 KNX Power Supply N125/23 640mA 30VDC DIN Rail

The 5WG1125-1AB23 (N 125/23) is a KNX system power supply unit delivering 640 mA at DC 30 V to power KNX bus devices in building automation installations. It generates the regulated KNX bus voltage from a 230 V AC / 50 Hz (or 220 V DC) mains supply.

Multiple N 125/23 units can be operated in parallel to increase available bus current for large KNX line segments with many bus devices. Features DIN rail mounting on TH35 rail (DIN EN 60715) with maintenance-free PUSH-IN terminals accepting 0.5–2.5 mm² conductors.

The N 125/23 is the standard KNX line power supply for medium-to-large KNX building automation installations. Each KNX line segment requires at least one power supply unit; the 640 mA output supports up to approximately 64 standard KNX bus devices (at 10 mA consumption each) on a single line.

• Multi-line KNX systems (connected via KNX line couplers) with one N 125/23 installed per line
• Commercial office fit-outs mounted in electrical distribution boards
• Powering presence detectors, room operator units, switching actuators, and dimming actuators
• Parallel operation for heavily loaded lines with high-current devices

The parallel operation capability allows engineers to install two N 125/23 units on a heavily loaded line to provide up to 1280 mA combined bus current without redesigning the network topology.