AX5103-0000-0202 by Beckhoff

The AX5103-0000-0202 is a single-axis servo drive manufactured by Beckhoff for the AX Digital Servo Drives series. It converts fixed-frequency three-phase power into a controlled output that regulates motor torque and velocity in industrial automation systems. The unit supports DC-bus sharing and includes an internal brake chopper, allowing regenerated energy to be managed during motor deceleration. Its compact design is suitable for packaging lines, pick-and-place stations, and light machining axes that require precise speed and torque control.

The drive delivers a nominal output current of 3 A, while its parameters permit a minimum peak current setting of 1 A for lightly loaded mechanisms. During acceleration, the output current can rise to 7.5 A to provide additional torque. The reinforced DC link operates at up to 875 VDC, and the control section supports output frequencies as high as 599 Hz for high-speed motors. The housing has an IP20 rating and measures 317.70 mm in height, 92 mm in width, and 232 mm in depth without connectors. Internal power loss is 50 W, so the installation must provide sufficient panel ventilation to remove heat. A DC-link capacitance of 235 µF smooths voltage changes during rapid torque commands. An external braking resistor with a minimum resistance of 47 ? can be connected through the front terminals.

The built-in brake resistor absorbs up to 14 kW during short braking events, while an external resistor network increases the permissible peak braking power to 15 kW. For repetitive deceleration cycles, the continuous braking power is limited to 50 W to prevent thermal overload. The brake chopper directs regenerated motor energy to the selected resistor when the DC-link voltage rises during deceleration. This arrangement allows the drive to control braking energy without feeding it directly back to the incoming power supply. The module weighs 4 kg, which reduces the mechanical load on cabinet mounting surfaces and simplifies handling during installation. Its narrow housing also helps preserve horizontal space when several servo drives are installed together in a multi-axis enclosure.