The Siemens 6SL3520-1XB00-7AB0 is the 0.75 kW standard I/O variant of the SINAMICS G115D wall-mounted distributed drive family. Rated at 2.2 A output (High Overload) with a 380–480 V 3-phase supply, it operates without a fieldbus — speed commands are issued via hardwired digital inputs — making it a cost-effective choice for standalone light-duty conveyors and simple multi-step-speed applications.

When is this variant the right choice?

The standard I/O variant suits applications where the control system does not have — or does not need — a PROFINET network. The four programmable PNP digital inputs accept 24 V DC signals for fixed-speed selection, jog, enable, and direction control. Commissioning is via Mini-USB with TIA Portal Startdrive or via SINAMICS SD card, after which day-to-day operation requires only the hardwired I/O signals and a 24 V DC control supply (250 mA typical for FSA).

What motor types are supported?

The drive supports IE3 three-phase asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations. Control modes include V/f, V/f with FCC, and sensorless vector control. Output frequency spans 0–550 Hz in V/f mode and 0–240 Hz in vector mode. The integrated 180 V DC brake control output drives an electromechanical motor brake directly. Overload capability is 200% (4.4 A) for 3 seconds and 150% for 57 seconds — sufficient for typical conveyor starting duty.

Frequently Asked Questions

How does this differ from the AA0 I/O Control variant?

Both are non-fieldbus variants with identical electrical ratings. The AB0 uses a specific connector configuration that differs from the AA0 I/O Control variant. Functionally they are equivalent — same I/O count, same control modes, same commissioning tools. The choice typically depends on which connector type matches your field wiring standard.

What is the input current for upstream protection sizing?

At 400 V 3-phase, the rated input current is approximately 1.99 A. For circuit protection sizing, account for the 200% overload capability and the drive's power factor of 0.80–0.91. A 6 A or 10 A Type C circuit breaker is typical for this power level, but always verify against your local installation standards and the specific motor cable length used.