The SINAMICS G115D 6SL3520-1XA23-0AF0 is the 3 kW wall-mounted distributed frequency converter in FSB frame with AS-Interface communication — the highest fanless power rating in the SINAMICS G115D series, now in the 1XA catalog designation. The 1XA series (6SL3520-1X… prefix) extends beyond its previously known FSA range (1XA00, 1XA01) into FSB territory with the 1XA23 code — delivering the same 7.7 A rated output, 200% overload, natural convection cooling, and SIMOGEAR 2KJ8 direct mounting as its XH23, XN03, and XE43 counterparts. AS-Interface AF0 communication connects over the two-wire yellow AS-i cable for brownfield conveyor plants, with STO via F-DI.

What does the 1XA catalog designation mean for this drive?

The 1XA series (6SL3520-1X… prefix) is a parallel catalog series to the 0XH series (6SL3520-0X…). Previously, 1XA was known for FSA-frame PROFINET variants (1XA00, 1XA01 covering 0.37–1.5 kW). The 1XA23 code extends the 1XA catalog designation to 3 kW FSB fanless — confirming the 1XA series spans both FSA and FSB frames, with availability of all three communication variants (AA0, AF0, AB0) at this power tier. Hardware-wise, 1XA23 is identical to XH23, XN03, XM03, and XE43 — same 425 × 180 × 134 mm enclosure, same 7.12 kg, same 7.7 A rated current. The catalog prefix is a commercial identifier, not a hardware distinction.

Why choose the 3 kW fanless FSB for AS-Interface conveyor zones?

Three characteristics converge here: 3 kW covers mid-weight conveyor sections without stepping up to fan-cooled 4 kW; fanless natural convection means zero fan maintenance and immunity to airborne contaminants; AS-Interface communication connects over the existing yellow AS-i cable with 4-bit cyclic I/O for speed setpoints and status feedback. For brownfield AS-i plants upgrading conveyor drive power, the 1XA23 AF0 is a two-wire drop-in replacement — same AS-i master, same cable, higher power capability.

Frequently Asked Questions

What is the difference between 1XA23 and XH23?

Catalog designation only. 1XA23 (6SL3520-1X…) and XH23 (6SL3520-0X…) identify the same 3 kW FSB fanless hardware under different commercial catalog prefixes. Both support AA0, AF0, and AB0 communication variants. Drives are mechanically and electrically interchangeable.

Can I upgrade this drive to PROFINET later?

No — the communication interface is hardware-determined at order time. To migrate to PROFINET, replace with the AB0 variant. The motor, gearbox, and power connections remain unchanged.

Does the 1XA series cover all the same power ratings as 0XH?

Known 1XA codes to date cover 1XA00 (0.37–0.75 kW FSA), 1XA01 (1.1–1.5 kW FSA), 1XA23 (3 kW FSB fanless), and 1XA24 (4 kW FSB fan-cooled). The 1XA catalog series appears to parallel 0XH across FSA and FSB frames — check current Siemens catalog for the full 1XA code listing at higher FSC ratings.