The 6SL3520-0XH20-3AA0 is the 0.37 kW I/O Control G115D in the FSA frame — the entry-level G115D: smallest power, simplest control, smallest enclosure. It delivers 1.3 A rated (2.6 A overload) from a 380–480 V 3-phase supply, controlled through hardwired digital and analog I/O terminals. No fieldbus. No network. No fan. Just terminal-block control for the lightest conveyor zones in intralogistics and packaging lines.

The simplest G115D — who chooses I/O Control at 0.37 kW?

The 0.37 kW AA0 is the right choice when the mechanical load is minimal AND the control requirements are basic. A short roller conveyor zone under 1 m wide, a divert wheel, a small belt segment carrying individual items — these need a drive that starts, stops, and runs at a set speed. The I/O Control interface provides digital inputs for start/stop and direction, an analog input (0–10 V or 4–20 mA) for speed reference, and digital outputs for fault indication. STO is wired to a dedicated F-DI terminal. No bus configuration, no network hardware, no communication protocol to troubleshoot. For conveyor OEMs building standalone modules or end users retrofitting existing hardwired conveyor controls, the 0.37 kW AA0 is the lowest-cost, lowest-complexity entry into the G115D distributed drive platform.

FSA frame: compact and maintenance-free

The FSA enclosure (380 × 216 × 129 mm, 4.9 kg) uses natural convection cooling — no fan to inspect, clean, or replace. IP65 sealing handles dust and water-jet environments common in food & beverage and logistics facilities. At 0.37 kW, the drive operates at roughly 25% of the FSA frame's 1.5 kW thermal ceiling, leaving substantial thermal headroom for high-ambient installations or restricted-mounting scenarios. The 24 V DC control supply draws approximately 250 mA.

XH20-3: current catalog, 0XH series

XH20-3 is the current catalog designation for the 0.37 kW FSA in the 0XH series — available in I/O Control (AA0, this product) and AS-Interface (AF0, XH20-3AF0). For PROFINET at 0.37 kW, the 1XA series provides the 1XA00-3AB0 variant with PROFIsafe over Ethernet. All three communication variants share the same FSA hardware platform and power ratings.

Frequently Asked Questions

How is the speed setpoint adjusted on the I/O Control variant?

Via a 0–10 V analog input (external potentiometer), 4–20 mA current loop, or fixed-speed presets selected through digital input combinations during commissioning. The drive ships with default parameters adjustable via the SINAMICS Smart Access keypad or USB interface.

Can I add a fieldbus later?

No. AA0 (I/O Control), AF0 (AS-Interface), and AB0 (PROFINET) are factory-configured hardware variants — the communication interface is not field-upgradable. Select the variant matching your control architecture at time of purchase.

Is a separate 24 V DC supply required?

Yes — all G115D variants require 24 V DC for control electronics. The FSA frame draws approximately 250 mA. The 380–480 V 3-phase input powers the motor output stage only.