8LSN55.EB030D0 by B & R Automation

The 8LSN55.EB030D0 is a three-phase synchronous motor produced by B&R Automation for the 8LS Synchronous Motors series. Its internal designation is 8LSN, and it serves as the prime mover in servo-controlled axes on packaging lines, pick-and-place stages, and other automated cells. The unit converts commanded phase currents into continuous rotary motion, providing precise torque delivery for coordinated industrial positioning tasks. This operating role makes it suitable for applications that require accurate motion response, repeatable positioning, and stable speed control during automated machine cycles.

With a rated shaft speed of 3000 rpm, the motor can match standard servo drive output frequencies without gearbox multiplication. The motor uses a mounting flange that measures 142 mm across, which suits size-55 machine interfaces and supports secure installation on the driven assembly. Length code 5 indicates the overall body depth used for layout planning. Position feedback is delivered through an Inductive EnDat sensor that operates on protocol revision 2.1, allowing fully digital communication of rotor angle and diagnostic data. Its signal resolution reaches 19/12 bits for single-turn and multi-turn measurement, which supports fine interpolation during contouring and synchronized axis movement.

The encoder also records up to 4096 revs in multi-turn mode, so position information can remain available across power cycles without an external battery. Thermal management is handled by a self-cooling housing, which removes heat without forced airflow and helps keep the installation simple. Power and feedback conductors exit through an angled connection that can swivel to reduce cable strain in confined routing paths. The motor uses a smooth shaft, which is suitable for backlash-free clamp couplings. The unit does not include a holding brake or an oil seal, so static load retention and fluid protection must be handled by the surrounding machine design.