The 6SL3520-1XD03-0AB0 is the Standard I/O variant of the newly-discovered 1XD03 — the D-connector SINAMICS G115D at 3 kW FSB fanless for SIMATIC control systems. It delivers 7.7 A HO (15.4 A LO) in the fanless FSB enclosure (425 × 180 × 134 mm, 7.12 kg) with natural convection cooling. AB0 joins AF0 (PROFINET) at 1XD03 — AA0 (I/O Control) is structurally expected to complete the set. Operates at 380–480 V three-phase, compatible with IE2/IE3/IE4 motors across 0–550 Hz, IP65 sealed.