8LSA57.DB030S400-3 by B & R Automation

The 8LSA57.DB030S400-3 is a three-phase synchronous motor manufactured by B & R Automation within the 8LS Synchronous Motors series. This unit serves as the driving element for axes that require accurate torque and position control in automated machinery. The 8LSA designation indicates a standard build without reinforced bearings, and the smooth shaft simplifies power transmission to gearboxes or couplings while minimizing runout.

The motor reaches a rated speed of 3000 rpm, allowing it to match common servo inverter output frequencies. A flange dimension of 142 mm provides a consistent reference surface and aligns with the mounting flange pattern used on machine frames. For safety during power loss or vertical load holding, a heavy-duty holding brake is integrated. Power, feedback, and brake conductors share a single-cable hybrid connection, reducing cabinet wiring complexity, and terminations are completed through a sealed connector on the motor housing. Length code 7 corresponds to the housing depth used for the required torque class, and the mounting flange supports rigid installation. Because no oil seal is fitted, the shaft interface should remain free of fluid exposure.

Thermal management relies on self-cooling with free air circulation, eliminating the need for external blowers. Position feedback is supplied by an inductive EnDat 2.2 encoder that supports multi-turn counting up to 4096 revs and delivers a combined resolution of 19/12 bit for single-turn and multi-turn operation. The absence of an oil seal reduces friction but requires a clean environment. Product Revision 3 identifies the third revision of this motor version, and the inductive sensing principle resists magnetic interference for stable feedback. The unit's self-contained design and mounting features allow straightforward integration into indexing tables, packaging lines, and pick-and-place gantries.