Product Description:

The NAM04.1-480-0450-NN-120 is a power line form module produced by Bosch Rexroth Indramat and assigned to the NAM Power Line Form Modules series. It converts three-phase mains power into a stabilized DC link that feeds multiple drive controllers inside an automation cabinet. By integrating control electronics, fusing, and pre-charge circuitry in one chassis, the unit simplifies the incoming power section and coordinates inrush behavior when large capacitor banks are connected.

The control section is synchronized to a 60 Hz supply and is protected by a 3.0 A Curve C miniature fuse. Only 15 VA of control power is drawn at a nominal control voltage of 120 V, minimizing heat load on the auxiliary transformer. The main terminals accept three input phases within the 480 V voltage class, and an internal soft-start network limits charging current to 1000 VA / 150 ms to avoid nuisance breaker trips. An environmental class 3K3 designation allows operation in clean electrical rooms with moderate temperature and humidity. Because the product includes no mains detection, external sequencing logic must supervise the supply. A pre-charge output of 120 V at 1 A is available for external contactors, and wiring to terminal strip X10 is arranged over 13 poles. Conductors down to 1.5 mm² can be landed on the spring terminals, easing field installation.

The power path is designed for a continuous bus current of 450 A, and energy is stored in DC link capacitors up to 150 mF to handle regeneration from connected drives. The open-frame construction carries a protection rating of IP00, so it must be mounted inside a closed cabinet to prevent accidental contact. Total in-cabinet mass is 20 kg, which eases panel layout compared with heavier transformer assemblies. The terminal arrangement helps keep cabinet wiring organized.