AX2003-S60300-520 Beckhoff
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The Beckhoff AX2003-S60300-520 is part of the AX Digital Servo Drives series and has a rated installed load of 2 kVA with a rated output current of 3 Arms. It features an analog input resolution of 1.25 mV, a peak output current of 6 Arms, and an output stage clock of 8 kHz. The drive weighs 4 kg and has a width of 70 mm.
Internal Product Review
The AX2003-S60300-520 is a Beckhoff digital servo drive that delivers 3 Arms rated output current with 6 Arms peak capacity. Analog command handling is especially refined, with 1.25 mV resolution and a 62.5 µs update rate, making this unit a strong choice for precise servo control.
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Product Description:
The AX2003-S60300-520 is a digital servo drive produced by Beckhoff within the AX Digital Servo Drives series. In an automation cell, it interfaces between a motion controller and a synchronous or asynchronous motor, regulating torque, speed, and position by modulating the bus-supplied DC voltage through an internal IGBT stage. The unit occupies 70 mm of panel width, allowing dense side-by-side mounting, and it is suited for single-axis machines that require precise current control while using an external braking resistor to dissipate excess energy.
The drive’s analog front end samples command signals with a resolution of 1.25 mV and refreshes those samples every 62.5 µs, so small reference changes are applied quickly to the current loop. It accepts differential voltage commands up to ±10 V and presents 20 kΩ of input resistance to analog ground, minimizing load on upstream controllers. The power stage is synchronized by an 8 kHz carrier, which sets the minimum ripple in the motor current. Under continuous conditions, the inverter supplies 3 Arms, and short bursts up to 6 Arms are available for acceleration or disturbance rejection. Motor windings connected to the drive must present at least 12 mH of inductance, which helps prevent overcurrent events, and the internal IGBTs add a residual voltage drop of 5 V between the DC bus and the motor terminals.
From a power standpoint, the converter is designed for a rated installed load of 2 kVA. Thermal losses amount to 40 W when operating at rated current, while standby electronics draw an additional 15 W of quiescent power. Regenerative braking energy is dissipated through a factory-specified 33 Ω external resistor, which protects the DC link from overvoltage. The output filter tolerates up to 75 mH of motor inductance without destabilizing the current controller, and the module has a mass of 4 kg.
