The Siemens 6SL3520-1XB40-7AF0 is the PROFINET/EtherNet/IP communication variant in the 1XB4x sub-series of the SINAMICS G115D wall-mounted distributed drive family, rated at 0.75 kW in the compact FSA frame (380 × 156 × 129 mm). With 2.2 A rated output (High Overload), 380–480 V 3-phase supply, and integrated PROFIsafe SIL 2 safety, it brings networked drive functionality to light conveyor sections with the B-type connector.

Why PROFINET at 0.75 kW?

Every conveyor section — regardless of power — benefits from a unified network. A 0.75 kW belt turn or small diverter appears in TIA Portal alongside the main conveyor drives with identical parameter structure and diagnostic access. PROFIsafe travels on the same bus cable. The integrated 2-port switch enables daisy-chain topology. The 1XB40 serves as the entry-level PROFINET variant in the 1XB4x sub-series — from here, the same B-connector ecosystem scales continuously to 4 kW in FSB.

What motor types are supported?

The drive delivers 2.2 A rated output current with 200% overload — 4.4 A for 3 seconds. Supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 0.75 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. FSA frame: natural convection cooling, IP66 / UL Type 4X.

Frequently Asked Questions

How does the 1XB40 compare to the 1XB00 at 0.75 kW?

Both are 0.75 kW FSA PROFINET variants with B-connector. The 1XB00 belongs to the 1XB0x sub-series; the 1XB40 belongs to the 1XB4x sub-series. Electrically and mechanically identical — same frame, same 2.2 A rated output, same PROFINET stack. The sub-series distinction is commercial catalog organization.

Can this drive be the only PROFINET node on a small conveyor line?

Yes. The G115D PROFINET variant can operate as a standalone PROFINET IO device — it does not require other networked drives on the same line. A single 1XB40-7AF0 can be the sole PROFINET node, controlled by a SIMATIC PLC with all other sections running hardwired I/O. This is a common pattern for phased network migration: network the critical sections first, add others later.

Is an external braking resistor required?

The integrated 180 V DC brake chopper is sufficient at 0.75 kW for typical conveyor duty. An external braking resistor (minimum 200 Ω for FSA) is rarely needed at this power level.