Product Description:

The AX5203 is a dual-axis digital servo drive from Beckhoff’s AX Digital Servo Drives series. It works as the energy interface between a common DC bus and two servo motors, shaping current waveforms so position, speed, and torque commands issued by a PLC can be carried out with millisecond precision. By combining switching transistors, braking circuits, and monitoring functions in a single enclosure, the unit supports high-density drive cabinets for packaging lines, handling gantries, and other motion platforms that rely on coordinated multi-axis control. Because both amplifier channels are housed together, the drive is well suited to machines that need synchronized motion in a compact cabinet layout.

The drive’s DC bus is rated for a maximum of 875 V DC, and a 470 µF link capacitor smooths ripple while storing regenerative energy returning from decelerating axes. Each output channel delivers a continuous armature current of 3 A; during acceleration or shock loading, it can supply up to 10 A per channel for several seconds. Thermal modeling of the power stage is based on a measured 85 W of conduction and switching loss, so heat must be removed through panel ventilation or cold-plate mounting to keep semiconductor junctions within limits. These electrical values guide the selection of fuses, busbars, and cooling hardware connected to the DC link.

Dynamic braking resources are split between an onboard chopper that dissipates 150 W continuously and up to 14 kW for short bursts, and an external resistor connection that can absorb as much as 15 kW when rapid deceleration of high-inertia loads is required. The terminal for that resistor must not fall below 47 Ω, otherwise the chopper transistor can exceed its current rating during energy dumping. Mechanical integration is eased by the housing’s 92 mm width, along with a 232 mm depth and 317.70 mm height, allowing two-axis control to fit into cabinet space normally occupied by a single conventional drive. This arrangement suits applications with frequent acceleration and braking, where recovered energy and limited panel space must both be managed carefully.