The Siemens 6SL3520-1XB42-2AF0 is the PROFINET/EtherNet/IP communication variant in the 1XB4x sub-series of the SINAMICS G115D wall-mounted distributed drive family, rated at 2.2 kW — the transition power where G115D moves from the compact FSA frame to the larger FSB fanless frame (425 × 180 × 134 mm, 7.12 kg). With 5.9 A rated output (High Overload) and a 380–480 V 3-phase supply, this is the first 1XB4x variant to use the FSB frame, bridging the FSA-range 1XB40/41 and the higher-power 1XB43/44. The AF0 suffix provides PROFINET with PROFIsafe SIL 2 safety on a single bus cable via the B-type connector.

What makes the 1XB4x sub-series different from 1XB0x?

The 1XB connector family has two parallel sub-series: 1XB0x (1XB00 at 0.55–0.75 kW, 1XB01 at 1.1 kW) and 1XB4x (1XB40 at 0.55–0.75 kW, 1XB41 at 1.1–1.5 kW, 1XB42 at 2.2 kW, 1XB43 at 3 kW, 1XB44 at 4 kW). Both use the B-type connector (position 10 = B). The 1XB4x sub-series spans FSA+FSB continuously from 0.55 to 4 kW — a complete catalog path within a single connector ecosystem. Electrically and mechanically, a 2.2 kW 1XB42 is identical to a 2.2 kW 0XC02 except for the connector form factor.

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. The integrated 2-port PROFINET switch supports daisy-chain line topology and MRP ring redundancy.

Frequently Asked Questions

How does the 1XB42 compare to the 1XB01 at 1.1 kW?

The 1XB01 (1.1 kW, FSA) is the highest-power 1XB0x sub-series variant in the FSA frame. The 1XB42 (2.2 kW, FSB fanless) is the entry point to FSB in the 1XB4x sub-series. Both use the B-connector. The jump from 1XB01 to 1XB42 involves a frame change (FSA → FSB: 45 mm wider, 24 mm taller, ~2.4 kg heavier) and nearly double the rated current (3.1 A → 5.9 A). The 1XB4x sub-series fills the gap cleanly: 1XB40/41 cover FSA power, 1XB42/43/44 cover FSB power.

Is this the same hardware as the 0XC02-2AF0?

Electrically identical — same 5.9 A rated, same PROFINET stack with PROFIsafe, same FSB fanless frame. The difference is the connector: 1XB uses B-type, 0XC uses C-type. Choose based on your facility's cable standard.

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 frequent emergency stops on decline sections.