Product Description:

The AX2020-S62000-520 is a two-channel digital servo drive produced by Beckhoff as part of the AX Digital Servo Drives series. In an automation cell, it generates regulated phase currents and interprets feedback so that synchronous or induction motors follow position and speed commands from the controller. By combining power electronics with fast signal conditioning, the unit serves as a compact interface between a machine PLC and its mechanical axes, allowing coordinated motion without external amplifiers. It mounts on a DIN rail and integrates with an EtherCAT-based control architecture.

The drive’s differential analog channel presents 20 kΩ of input resistance, and its sampling hardware updates every 62.5 µs to support rapid torque changes. Encoder feedback is accepted on the sin/cos port at frequencies up to 250 kHz, so high-resolution position data can be processed without loss. A current form factor of 1.01 indicates that RMS and average output currents are nearly identical, which helps limit extra heating. The power stage supports motor windings with inductance from 2 mH to 12 mH, letting the same unit run compact servomotors as well as larger actuators. During steady operation, it supplies 20 A rms, while momentary surges can reach 40 A rms. The housing is 120 mm wide and weighs 7.5 kg for cabinet installation.

At full current, the inverter dissipates 200 W, and the energized DC bus adds 15 W of quiescent loss. Braking energy is first absorbed by an internal regeneration stage of the same rating; beyond that level, an external resistor of 33 Ω can be fitted to protect the link. The DC bus has only 5 V of residual drop, which helps preserve voltage during dynamic torque changes. The mains side must provide an installed load of 14 kVA to support continuous output and regeneration at the same time.