The 6SL3230-3YE44-1UP0 is an unfiltered 90 kW SINAMICS G120X drive in the FSF frame, rated for 241 A output at 480 V three-phase. Unlike the C2-filtered variants in the same power class, this unit ships without an integrated EMC filter — the intended configuration for installations that rely on cabinet-level or external filtering. The 1-prefix suffix indicates the presence of DC terminals for connecting du/dt filters, essential when motor cable lengths exceed the drive's unfiltered maximum or when reflected-wave protection is required.

When should an unfiltered drive be specified over a C2-filtered variant?

An unfiltered configuration makes sense in three scenarios: the control cabinet already provides centralized EMC filtering, the installation requires Category C1 (residential) compliance achievable only with a specific external filter, or the motor cable run is short enough that conducted emissions stay within limits without a filter. The trade-off is that the installer must specify and wire a separate EMC filter — the drive itself provides no conducted emission suppression.

What role do the DC terminals play in motor protection?

The integrated DC terminals allow direct connection of a du/dt filter or sine-wave filter on the motor side. For motor cable runs exceeding approximately 150 m (shielded) or 225 m (unshielded) without an output filter, voltage reflections at the motor terminals can degrade winding insulation over time. A du/dt filter connected to the DC link mitigates this without the voltage drop and power loss of a full sine-wave filter. The 0-prefix G120X variants omit these terminals, limiting output filtering options to motor-mounted reactors.