The 6SL3520-0XN04-0AF0 is the 4 kW AS-Interface variant in the G115D family — the highest-power fan-cooled FSB drive with a two-wire fieldbus interface. Rated at 10.2 A continuous (20.4 A overload) from a 380–480 V 3-phase supply, it drives conveyor segments carrying heavier products — pallet conveyors, merge and sortation units, and incline belts in logistics hubs and distribution centers.

What makes the 4 kW FSB different from lower-power G115D frames?

The 4 kW rating marks the transition to an integrated cooling fan — natural convection is insufficient beyond 3 kW in the FSB enclosure. The fan-cooled FSB (425 × 180 × 169 mm, 7.52 kg) adds 35 mm of depth versus the fanless FSB (134 mm) to accommodate the fan assembly, while keeping the same wall footprint. The drive still mounts directly on the machine — no control cabinet needed — but the fan requires periodic inspection in dusty environments. The 24 V DC control supply draws 510–550 mA versus 250–290 mA for fanless variants — budget accordingly when designing multi-drive control panels.

Why AS-Interface for a 4 kW conveyor drive?

AS-Interface (AF0) reduces wiring to two conductors: the yellow AS-i cable carries both power and communication to the drive. For conveyor systems with dozens of distributed drives across long cable runs, this cuts installation cost and complexity versus discrete I/O wiring. Drive commands (start/stop, speed setpoint, direction) and diagnostics (current, temperature, fault codes) travel over the same two wires. Compared to PROFINET, AS-Interface trades bandwidth for simplicity — ideal when the PLC already uses an AS-i master and the drive's control requirements are straightforward.

How does the 4 kW fan-cooled FSB compare to the 4 kW FSC?

The G115D offers 4 kW in both FSB fan-cooled (XN04/XH24/XM04) and FSC (5.5–7.5 kW only) frames. At 4 kW, the FSB fan-cooled enclosure is the correct choice — FSC starts at 5.5 kW with higher-rated IGBTs for heavier duty cycles. The two share the same 425 × 180 × 169 mm enclosure dimensions; the difference is internal power-stage rating, not external size.

Frequently Asked Questions

Does the AS-Interface variant support safety functions?

Yes — STO (Safe Torque Off) is available via a fail-safe digital input (F-DI) on the AF0 variant. Unlike the PROFINET AB0 variant which provides PROFIsafe over Ethernet, AS-Interface safety requires the discrete F-DI wiring in addition to the AS-i bus cable.

Can I replace an XM04 (earlier catalog) drive with this XN04 variant?

Yes. XN04, XM04, and XH24 are physically identical — same 4 kW FSB fan-cooled hardware. The designation difference reflects catalog generation: XM04 is the earliest, XN04 followed, XH24 is current. Mounting dimensions, power ratings, and electrical interfaces are the same across all three designations.

Is a separate 24 V DC supply required?

Yes — the G115D control electronics and fan require 24 V DC at 510–550 mA for this fan-cooled variant. The 380–480 V 3-phase input powers the motor output stage only; logic and communication run on 24 V.