AX5201-0000-0202 by Beckhoff

The AX5201-0000-0202 is a servo inverter manufactured by Beckhoff for the AX Digital Servo Drives series. In an automation cell, this unit modulates DC-link energy into precisely timed three-phase pulses so that matched motors can position loads with closed-loop accuracy. Two current-controlled output channels, an integrated brake chopper, and monitoring circuits make the drive suitable for compact handling stations and small processing axes. Within a multi-axis cabinet, the device slots beside identical frames and shares a common DC bus, simplifying installation and energy sharing.

At a 230 V mains supply, the apparent power capacity reaches 1.2 kVA, giving the inverter enough headroom to start and accelerate low-inertia servo motors without line sag. Each channel can deliver a nominal output of 1.5 A, while short dynamic moves are handled by a per-channel maximum of 5 A. When both outputs are driven simultaneously, the controller can supply a total peak device current of 10 A, so the upstream fuses and busbars must accommodate this value. Energy is buffered by a DC link containing 235 µF of capacitance, which smooths regenerated power and limits voltage ripple during switching events.

The drive's DC link can reach 875 VDC, a limit that protects the IGBTs and motor insulation when regenerative energy returns during high-speed deceleration. Excess energy that is not stored in the link is dissipated by the internal brake resistor, which handles 50 W continuously and tolerates bursts of up to 14 kW. If the duty cycle exceeds that capacity, an external resistor with a peak rating of 15 kW and a minimum resistance of 47 ? can be connected to the dedicated terminals. The brake chopper directs excess regenerative energy to the appropriate resistor during deceleration. This process limits voltage increases while allowing the drive to maintain the commanded motion cycle.