The 6SL3520-0XN03-0AB0 combines 3 kW of conveyor drive power, PROFINET communication, and fanless cooling in the FSB frame — the highest rating in the G115D range where natural convection still suffices. It delivers 7.7 A rated (15.4 A overload) from a 380–480 V 3-phase supply, with PROFINET IO, PROFIsafe (STO at SIL 3 / PL e), and EtherNet/IP over a single Ethernet cable.

Why 3 kW fanless with PROFINET — the sweet spot

The 3 kW FSB fanless occupies a unique position in the G115D lineup: it is the highest-power variant that requires no cooling fan, AND it supports PROFINET with PROFIsafe. This combination eliminates two maintenance items at once — no fan to inspect or replace, and no discrete safety wiring to install or troubleshoot. For conveyor OEMs and system integrators, this means a 3 kW distributed drive that mounts on the machine frame, connects to the PROFINET network with one cable, and runs for its service life with zero mechanical wear components. The integrated 2-port switch enables daisy-chain Ethernet topology — each drive connects to the next, reducing switch port count on long conveyor lines. Media redundancy (MRP) is supported for ring topologies.

3 kW fanless vs. 4 kW fan-cooled — when to stay below the fan threshold

The G115D fan-cooling threshold sits between 3 kW and 4 kW. At 3 kW (XN03/XH23), natural convection through the FSB enclosure (425 × 180 × 134 mm, 7.12 kg) dissipates heat without a fan. At 4 kW (XN04/XH24), the same enclosure gains 35 mm of depth and an integrated fan (425 × 180 × 169 mm, 7.52 kg). The 24 V DC draw jumps from 250–290 mA (fanless) to 510–550 mA (fan-cooled). If your conveyor segment's mechanical load falls within 3 kW, staying fanless saves the fan as a wear point, reduces control-panel power budget, and keeps the shallower 134 mm depth for tight machine-frame mounting. Move to 4 kW only when the load genuinely exceeds 3 kW continuous.

XN03 in context: intermediate catalog generation, same hardware as XH23

XN03 is the intermediate-generation catalog code for the 3 kW fanless FSB. It is physically identical to XM03 (earliest generation) and XH23 (current catalog). All three share the same 7.7 A / 15.4 A ratings, 425 × 180 × 134 mm enclosure, and communication interface options. When ordering a replacement, XH23-0AB0 is the current-catalog equivalent — but XN03 stock is fully functional and directly interchangeable.

Frequently Asked Questions

Does fanless operation limit the ambient temperature range?

The fanless FSB is rated for -30°C to +40°C ambient at full load, with derating above 40°C — the same temperature range as fan-cooled variants. Natural convection is sufficient within these limits. For installations above 40°C ambient, consult the G115D operating instructions for derating factors.

What motor types can this drive control?

IE3 3-phase asynchronous motors and IE4 synchronous reluctance motors. The G115D is preconfigured for SIMOGEAR 2KJ8 geared motor combinations. Third-party motors within the 7.7 A / 380–480 V rating are also supported.

Can I use this drive in a Rockwell PLC environment?

Yes. The AB0 PROFINET variant supports EtherNet/IP — the same hardware works with Allen-Bradley ControlLogix and CompactLogix PLCs. PROFIsafe on EtherNet/IP is not supported; safety functions on Rockwell systems would use the F-DI hardwired input instead.