The Siemens 6SL3520-0XC04-0AB0 is the 4 kW standard I/O variant of the SINAMICS G115D wall-mounted distributed drive family in the 0XC connector configuration — introduced as the 9th G115D product code system. The 0XC sub-family (position 10 = C) uses a specific connector arrangement that differs from 0XD and 1XB variants while sharing the identical G115D hardware platform and electrical ratings. At 4 kW (10.2 A rated output, 20.4 A overload), this is the FSB fan-cooled power level — the point where passive convection cooling reaches its thermal limit and an integrated fan becomes necessary.

Why fan-cooled at 4 kW?

The FSB frame (425 × 180 mm) can dissipate up to about 3 kW of drive losses passively — corresponding to roughly 3 kW of motor power. At 4 kW, the additional heat requires forced air, adding 35 mm of depth for the integrated fan (134 → 169 mm) and increasing 24 V DC control supply consumption from approximately 400 mA (fanless) to about 510 mA. The fan is integrated inside the IP66-sealed enclosure — the protection rating is not compromised. For continuous-duty conveyors running at or near full load for extended periods, the fan-cooled variant ensures the drive stays within its rated temperature range without derating.

When is the standard I/O variant the right choice at 4 kW?

At 4 kW, conveyors are typically main-line sections — accumulation conveyors, merge units, or incline belts — where the control architecture may already include a PLC but not necessarily a PROFINET network. The standard I/O variant accepts speed and direction commands via four programmable PNP digital inputs, making it compatible with any control system that can output 24 V DC signals. If the application requires cyclic process data exchange, remote diagnostics, or functional safety via PROFIsafe, choose the AF0 (PROFINET) variant instead.

What motor types are supported?

The drive supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 4 kW. Control modes: V/f, V/f with FCC, sensorless vector control. Output frequency: 0–550 Hz (V/f), 0–240 Hz (vector). Overload: 200% (20.4 A) for 3 seconds, 150% for 57 seconds. Integrated brake chopper with 180 V DC brake control output.

Frequently Asked Questions

What is the 0XC connector system?

0XC is the 9th confirmed product code system for the SINAMICS G115D platform (following XM, XN, XH, XE, 1XA, 0XE, 1XB, 0XD). The number in position 10 of the part number — C in this case — designates the connector configuration. All G115D code systems share the same hardware platform, electrical ratings, and control modes at each power level. The connector variant determines which pre-assembled cable sets and field-wiring accessories are compatible. 0XC, 0XD, and 1XB drives at the same power and communication code are electrically and functionally interchangeable.

Can 0XC and 0XD drives be mixed on the same line?

Yes. Both share the same commissioning workflow, control behavior, and mechanical mounting footprint. The only practical consideration is connector mating — ensure your field cable assemblies match the connector type on each drive. Mixing connector types on the same line is common where different conveyor sections were installed at different times or sourced through different channels.