Product Description:

The NAM04.2-480-0450-NN-230 power line form module is built by Bosch Rexroth Indramat for the NAM Power Line Form Modules series. It converts incoming three-phase mains power into a stabilized DC supply for multiple servo inverters and returns regenerated energy to the network when required by decelerating axes. The assembly is normally fastened inside a switchgear bay, and its 20 kg mass can be supported by standard mounting plates. Its open design makes internal cabinet airflow the primary cooling path, so the module depends on enclosure ventilation rather than a sealed housing.

The module accepts a nominal input of 3 AC 380–480 V with ±10% tolerance at 50/60 Hz, matching common factory distribution systems. During energization, it draws up to 1000 VA of inrush power for only 150 ms, after which current settles under the integrated 1.6 A breaker. A DC-link reservoir of 150 mF smooths the rectified voltage and supports fast energy exchange with connected drives, while the bus can deliver momentary load currents as high as 450 A. The unit carries an IP00 enclosure classification and an EMC class A2 designation, so the installation space must provide touch protection, filtration, and a conditioned ambient range of 0 to 45 °C.

Auxiliary electronics are supplied by an AC 230 V control feed and require only 15 VA, allowing the control circuit to share a small machine service transformer. Line conductors to the main terminals must use at least 2 × 120 mm² copper, and each lug is tightened to 35 Nm to maintain current-carrying capability at the power stage. The X10 terminal strip accepts signal wires from 0.2 to 2.5 mm², so sensor loops and interlocks can be landed without additional adapters. Separate power and signal terminations help keep high-current wiring distinct from low-level control connections inside the cabinet during service and operation.