Product Description:

The NAM04.2-480-0650-NN-230 is a power line form module manufactured by Bosch Rexroth Indramat for the NAM Power Line Form Modules series. In an automation cabinet, this device converts incoming three-phase mains energy into a stable DC link that supplies Indramat inverters and regenerative units. By performing this task, it balances load peaks, shapes line current, and provides the initial charging path for high-power drive packages on production machinery.

The internal control circuitry is energized from a single-phase feed of AC 230 V ±10%, 50/60 Hz, so a small auxiliary transformer is usually sufficient. On the power side, the unit can pass up to 650 A of continuous line current to downstream axes, while its DC link can store 150 mF of energy to smooth voltage during rapid motoring or regenerating events. The open-chassis design is identified by an enclosure rating of IP00, meaning it must be mounted inside a protected control cabinet with forced ventilation. Despite its current capacity, the unit’s own electronics draw only 15 VA, minimizing heat load on the low-voltage supply. A preload output current of 1 A limits inrush when the capacitor bank charges, and the recommended 1.6 A miniature breaker protects the auxiliary line. Minimum conductor sections start at 1 mm² for signaling, 1.5 mm² for the control supply, and 2 × 2 × 240 mm² for the power path.

The module is intended for Environmental Class 3K3 conditions, so it is suited for clean, dry factory areas with controlled temperature. Power bars are fastened to a tightening torque of 35 Nm, which helps maintain low-resistance joints during full-load operation. For short disturbances, the module withstands a transient load of 1000 VA for 150 ms, helping prevent nuisance trips when drives brake suddenly. With a mass of 20 kg, the assembly requires adequate panel support and careful handling during installation.