Product Description:

The HNF01.2D-F240-R0026-A-480-NNNN mains filter is produced by Bosch Rexroth Indramat for use within the HNF Mains Filters series. The unit is installed on the line side of regenerative drive packages to attenuate conducted emissions and return surplus kinetic energy to the supply grid. By limiting high-frequency noise and smoothing current flow, it helps multi-axis machines meet electromagnetic compatibility requirements while protecting upstream fuses, contactors, and transformers. It is typically used where several servo axes share one cabinet and operate from a common regenerative DC bus.

The housing carries a degree of protection of IP20, so the terminals are finger-safe, but the filter must be mounted inside a control cabinet. The mains terminals accept 3 × AC 400–480 V (-15 %/+10 %, 50/60 Hz), matching common plant distribution networks. Its conducted noise performance is categorized as C2 - DIN EN 61800-3, which extends attenuation beyond the standard range to cover higher switching frequencies from modern inverters. Use is limited to regenerative systems, so the supply class is for regenerative devices only. When these conditions are met, one filter can serve up to 6 axes, with a maximum cable length of 240 m. This arrangement supports distributed servo axes from a single filter rather than requiring a separate suppression component for each motor connection. The extended attenuation range also helps reduce interference returning to the plant supply.

Mechanical configuration is identified as design version 2 within production 01, so mounting dimensions and terminal layouts follow the second-generation layout of the HNF platform. These identifiers keep panel cutouts and wiring harness routing consistent in cabinets built around the same platform. The filter also maintains predictable leakage current levels and harmonic damping, which helps upstream protection devices operate as intended in compatible regenerative installations. Its placement on the incoming line side keeps the suppression function close to the source of conducted interference. That layout also preserves consistent terminal spacing for busbar or cable routing inside compact enclosures.