The Siemens 6SL3520-1XB42-2AB0 is the standard I/O variant in the 1XB4x sub-series of the SINAMICS G115D wall-mounted distributed drive family, rated at 2.2 kW — the transition power from FSA to FSB. With 5.9 A rated output (High Overload), 380–480 V 3-phase supply, and the FSB fanless frame (425 × 180 × 134 mm, 7.12 kg), it brings B-connector hardwired control to the entry-level FSB power class. The AB0 suffix provides standard I/O with a distinct terminal configuration from the AA0 I/O Control variant.

What does Standard I/O mean at 2.2 kW?

The AB0 variant uses hardwired digital inputs for speed, direction, and enable signals — connected to pushbuttons, relays, or a basic PLC output card. The terminal configuration differs from AA0 (I/O Control), giving facilities with existing AB0 cable standards a drop-in replacement at the FSB entry power. The full G115D motor control suite — V/f, V/f with FCC, sensorless vector control — operates identically to the PROFINET variant. Only the setpoint delivery method differs. Commissioning is via Mini-USB with TIA Portal Startdrive or SD card.

How does the 1XB4x sub-series organize power ratings?

The 1XB4x sub-series spans 0.55–4 kW continuously across FSA and FSB frames, all with the B-type connector. 1XB40 covers 0.55–0.75 kW FSA, 1XB41 covers 1.1–1.5 kW FSA, 1XB42 covers 2.2 kW FSB fanless (this product), 1XB43 covers 3 kW FSB fanless, and 1XB44 covers 4 kW FSB fan-cooled. This makes 1XB4x the most complete single sub-series in the G115D connector ecosystem — one connector type from the smallest to the largest wall-mounted drive.

What motor types are supported?

The drive delivers 5.9 A rated output current with 200% overload — 11.8 A for 3 seconds. Supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 2.2 kW. Control modes: V/f (0–550 Hz), V/f with FCC, sensorless vector control (0–240 Hz). Pulse frequency: 4–16 kHz. Integrated 180 V DC brake control.

Frequently Asked Questions

Can this drive be upgraded to PROFINET later?

No. The communication interface is hardware-defined at order. If network integration is a future possibility, select the AF0 variant — it provides both fieldbus and digital input fallback. At 2.2 kW, the cost difference between AB0 and AF0 is small relative to total installed cost.

Is an external braking resistor required?

The integrated 180 V DC brake chopper handles an electromechanical motor brake directly. An external braking resistor (minimum 130 Ω for FSB) is only needed for high-inertia loads or decline sections with frequent emergency stops.