AX5118-0000-0200 by Beckhoff

The AX5118-0000-0200 is a digital servo drive developed by Beckhoff for the AX Digital Servo Drives series. Acting as the power stage between an EtherCAT controller and a rotary motor, it rectifies three-phase mains power and delivers modulated output that controls commanded torque, speed, or position. This capability makes the unit a core component in packaging, pick-and-place, and material-forming equipment that relies on repeatable motion sequences.

During continuous operation, the inverter supplies a nominal phase current of 18 A, representing the thermal load that the power semiconductors can endure without derating. For short bursts such as acceleration, current headroom is available up to a peak value of 36 A. With a 400 V AC supply, the drive has an S1 apparent power rating of 12.5 kVA, matching medium-sized synchronous or induction motors. Energy is stored in a DC link that can reach a maximum of 875 VDC. The associated reservoir capacitor has a capacitance of 1175 µF, smoothing regenerated energy and minimizing bus ripple. Eight digital inputs permit edge-triggered reference signals, while a dedicated 1 A sensor supply powers encoders or limit switches without additional wiring.

Excess kinetic energy is dissipated internally at up to 26 kW, and the unit can be paired with external chopper resistors for a braking capacity of up to 32 kW. Resistance must not fall below 22 ? to keep transistor currents within permissible limits. The converter generates 255 W of heat, a value used when sizing cabinet ventilation. With a protection rating of IP20, the housing is intended for clean electrical enclosures and measures 317.7 mm in height, 185 mm in width, and 232 mm in depth. Continuous braking power is 200 W, allowing the drive to manage routine stopping cycles while maintaining a stable DC-link voltage.