The SINAMICS G115D 6SL3520-2XB43-0AB0 is the I/O variant at 3 kW — the highest fanless power rating in the G115D wall-mounted drive family. It carries an NCNR (Not Suitable for New Designs) status. All control signals are hardwired through digital terminals, with natural convection cooling keeping the FSB enclosure depth at a compact 134 mm and eliminating the integrated fan required at 4 kW.

What does AB0 I/O offer at the 3 kW power level?

The AB0 suffix delivers expanded digital I/O compared to the AA0 base variant: more discrete inputs and outputs for start/stop, direction, and speed selection, plus expanded Safe Torque Off (STO) via fail-safe digital inputs (F-DI). Commands arrive as 24 V signals on screw or spring-clamp terminals — no fieldbus, no network configuration, no GSDML files. The drive executes what the terminals tell it.

When is hardwired I/O the right choice at 3 kW?

Hardwired I/O fits conveyor zones where the upstream controller already outputs discrete signals, where no PROFINET backbone exists on the machine section, or where the maintenance team prefers terminal-block troubleshooting over network diagnostics. At 3 kW fanless, the drive has no fan to monitor and no fieldbus to configure — the entire unit is a self-contained power stage responding to terminal commands.

How does the I/O variant compare to the PROFINET variant at 3 kW?

The AB0 and AF0 variants share the identical 3 kW fanless power stage, FSB enclosure, C2 EMC filter, and braking chopper. The AB0 replaces the AF0's M12 PROFINET ports with additional digital I/O terminals and F-DI for STO. For applications where control simplicity outweighs the diagnostic bandwidth of a fieldbus, the AB0 variant delivers the same motor performance with fewer integration steps.