Stepper Motors


 The new AS1xxx stepper motors from Beckhoff Automation provide a cost-effective alternative to servo motors in the small and medium capacity ranges. Different stepper motor types in this series have nominal current ratings from 1.0 A to 5.0 A and torques ranging between 0.38 Nm and 5 Nm. The AS1xxx series can be used as actuators or auxiliary axes for numerous machine designs and automation applications.

In conjunction with the KL2531 and KL2541 stepper motor I/O Bus Terminals and TwinCAT automation software, axes can be easily and cost-effectively integrated into any stepper application – without the need for remote amplifiers. This approach requires fewer components, reducing installation costs.

The KL2531 Bus Terminal covers the lower capacity range up to a peak current of 1.5 A per phase with a supply voltage up to 24 V DC. The KL2541 offers higher performance comparable to that of small servo drives. With a peak current of 5 A per phase and a supply voltage from 8 V to 50 V DC, the KL2541 can generate an impressive torque of 5 Nm when used in conjunction with a standard stepper motor.

In order to simplify electrical connections, the stepper motors are equipped with pre-assembled plug connectors. Planetary gear units, incremental encoders and pre-assembled connection cables will become available direct from Beckhoff Automation as accessories.

Beckhoff Automation provides advanced, open automation products based upon proven technologies so that customers can implement high performance control systems faster and at a lower overall cost than traditional PLC and motion control systems. Beckhoff’s “New Automation Technology” product range includes PC based control, industrial PCs, automation controllers, operator interface, I/O, servo drives and motors. With representation in more than 60 countries, Beckhoff is well positioned to provide global sales and service to its customers. Sales and service are handled directly, with no intermediaries involved to provide faster response and improved communications.


• Rated supply voltage 24…50 V DC • Rated current (per phase) 1.0 A • Standstill torque 0.38 Nm • Winding resistance (per phase) 4.10 Ω • Winding inductance (per phase) 9.50 mH • Rotor moment of inertia 0.056 kg cm² • Resolution 1.8°/200 full steps • Dimensions (r x length) 42 mm x 39 mm. • Weight 0.31 kg • Bus Terminal KL2531
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