The 6SL3520-0XB01-5AB0 is the Standard I/O variant at 1.5 kW in the newly-discovered 0XB01 code — the 0XB0x sub-series B-connector SINAMICS G115D for SIMATIC control systems, now confirmed in the FSA compact frame (380 × 156 × 129 mm, ~4.7 kg). It delivers 4.1 A HO (8.2 A LO) with natural convection cooling. AB0 provides terminal-based Standard I/O control — a practical option for SIMATIC panels where PROFINET ports are fully allocated and hardwired signals are preferred. Operates at 380–480 V three-phase, compatible with IE2/IE3/IE4 motors across 0–550 Hz, IP65 sealed.