The Siemens 6SL3520-0XC02-2AA0 is the I/O Control variant of the SINAMICS G115D wall-mounted distributed drive family in the 0XC connector configuration, rated at 2.2 kW — the power level where G115D transitions from the compact FSA frame to the larger FSB fanless frame (425 × 180 × 134 mm). With 5.9 A rated output (High Overload) and a 380–480 V 3-phase supply, it serves conveyor sections that have outgrown the FSA thermal envelope but do not require a fieldbus network — accumulation zones, merge beds, and incline sections where hardwired digital inputs provide all the control signals needed.

Why I/O Control at the FSB entry power?

Not every 2.2 kW conveyor section needs PROFINET. I/O Control uses four programmable PNP digital inputs for speed, direction, and enable — connected directly to pushbuttons, relays, or a basic PLC output card. The full G115D motor control suite (V/f, V/f with FCC, sensorless vector control) operates identically to the networked variants — only the setpoint delivery method differs. For facilities with a relay-based control architecture or a basic controller without PROFINET, this variant eliminates the cost of a fieldbus node, switch port, and network commissioning while delivering the same motor performance. Commissioning is via Mini-USB with TIA Portal Startdrive or SD card — once parameters are loaded, day-to-day operation requires only 24 V DC I/O signals and a 250 mA control supply.

What changes at the FSA-to-FSB boundary?

Above 1.5 kW, natural convection in the FSA frame (380 × 156 × 129 mm) cannot reliably dissipate the drive's internal losses. The FSB fanless frame (425 × 180 × 134 mm) provides additional surface area for passive cooling, handling up to 3 kW without a fan. For the user, the practical difference is the mechanical footprint — FSB is 45 mm wider and 24 mm taller than FSA. Mounting hole patterns differ, but the electrical interfaces (power, I/O, 24 V DC control supply) follow the same G115D conventions. The 0XC connector (position 10 = C) is the FSB connector variant — compatible with other 0XC drives on the same conveyor line.

What motor types are supported?

The drive delivers 5.9 A rated output current with 200% overload — 11.8 A for 3 seconds. It supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 2.2 kW. Control modes: V/f (0–550 Hz), V/f with FCC, sensorless vector control (0–240 Hz). Pulse frequency: 4–16 kHz. Integrated 180 V DC brake control drives an electromechanical motor brake directly.

Frequently Asked Questions

How do I choose between AA0 and AF0 at 2.2 kW?

AA0 (I/O Control) uses hardwired digital inputs for speed commands. AF0 (PROFINET) adds cyclic process data exchange, remote diagnostics, and PROFIsafe SIL 2 safety on a single bus cable. Choose AA0 when the control architecture is relay-based, the conveyor operates at fixed speeds, and safety is managed by an external hardwired circuit. Choose AF0 when the section must integrate into a SIMATIC PLC network, needs remote diagnostic access, or uses PROFIsafe for the emergency stop loop. The AF0 variant can always accept digital input commands as a fallback — giving you both options in one device.

Can I switch to PROFINET later?

No. The communication interface is determined by hardware at order and cannot be field-upgraded. If future network integration is a possibility, select the AF0 variant upfront — the marginal cost difference at 2.2 kW is minimal compared to the cost of retrofitting a different drive later.

Is an external braking resistor required?

The integrated 180 V DC brake chopper handles an electromechanical motor brake directly. An external braking resistor (minimum 130 Ω for FSB) is only needed for high-inertia loads, frequent emergency stops, or decline sections where regenerative energy exceeds the internal chopper's thermal capacity.