AX2523-B750S403A-SE-520 Beckhoff
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The Beckhoff AX2523-B750S403A-SE-520 is part of the AX Digital Servo Drives series and features a rated output current of 3 Arms with a peak output current of 9 Arms. It offers 4 digital inputs, 2 digital outputs, a 14-bit analog input resolution at ±10 V, and utilizes a SERCOS fieldbus interface. This servo drive has dimensions of 230 mm in height, 50 mm in width, 240 mm in depth, and weighs 1.7 kg.
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Product Description:
The AX2523-B750S403A-SE-520 is a digital servo drive produced by Beckhoff within the AX Digital Servo Drives series. It is intended to regulate torque, velocity, and position in automation cells that employ synchronous or induction motors, forming the power stage between the machine controller and the motor windings. By integrating current regulation, signal conversion, and safety monitoring, the unit supports compact cabinet layouts and simplifies multi-axis coordination in material handling, packaging, and assembly systems.
The drive samples command and feedback channels through a 14-bit analog input that accepts a control span of ±10 V, allowing fine-grained speed or torque reference scaling. A control-loop clock of 8 kHz updates current vectors every 125 µs, so the amplifier can react quickly to load changes while remaining stable on inductances down to the 12 mH minimum. Continuous motor excitation is limited to a rated phase current of 3 Arms, and transient overloads can draw up to 9 Arms for rapid acceleration. Four digital inputs capture limit switches or drive enable signals, and two digital outputs report status to the machine controller. Internal losses remain modest, with 30 W dissipated at rated current and only 12 W in quiescent mode, reducing cabinet cooling demands.
A fiber-optic SERCOS interface provides deterministic fieldbus communication, synchronizing multiple axes without separate encoder networks. Mechanically, the housing is 50 mm wide, 230 mm high, and 240 mm deep, so it fits standard 300 mm control enclosures while leaving space for power distribution. The permissible motor circuit inductance extends to 75 mH, enabling the drive to handle long cable runs or high-inductance windings without overshoot. Total mass is only 1.7 kg, which eases installation on DIN rails or slide-in frames and minimizes strain on hinged panel doors.
