The 6SL3255-0BW01-0NA0 is the SINAMICS CUA20 adapter kit — a hardware solution for mounting a G120 Control Unit separately from its PM240-2 Power Module. In standard installations the CU clips directly onto the power module, but cabinet depth, thermal constraints, or cable routing can make this impractical. The CUA20 solves this with a flat interface adapter that stays on the power module, a mounting plate for the CU wherever it fits, and a pre-assembled cable linking the two.

Which Power Modules and Control Units does this fit?

Power Modules: PM240-2, all frame sizes FSA through FSG. Control Units: CU230P-2, CU240E-2, and CU250S-2. The kit is not compatible with CU240B-2 based converters — check your CU model before ordering.

What is included in the kit?

Three components: the power module interface adapter, the control unit mounting plate, and a pre-assembled connecting cable. The interface adapter mounts to the PM240-2 in place of the CU; the mounting plate holds the CU at the remote location; the cable bridges them. All mounting hardware is included.