8LSA57.EB022DC04-3 by B & R Automation

The 8LSA57.EB022DC04-3 is a three-phase synchronous motor from B & R Automation that belongs to the 8LS Synchronous Motors series. As an electromechanical drive element, it supplies precisely regulated torque and speed to automated production equipment, letting controllers position loads quickly and repeatedly. The 8LSA designation indicates a reinforced A-side bearing, and an inductive encoder supports accurate feedback while the shaft handles moderate radial forces in normal machine service.

It reaches a nominal shaft speed of 2200 rpm, giving the driven axis a predictable operating point during rated use. The stator is arranged for three-phase synchronous operation, which helps maintain smooth torque production and steady efficiency across typical motion tasks. A self-cooling, free circulation housing removes internal losses without auxiliary fans, so surrounding equipment can stay simpler and airflow requirements remain low. Feedback is handled through an Inductive EnDat interface, and the EnDat 2.1 protocol carries position, temperature, and diagnostic data over one cable. Inside the encoder, the signal is quantized to 19/12 bits for single-turn and multi-turn data, allowing the control system to resolve fine shaft movement while retaining absolute position information.

The motor uses a 142 mm square mounting flange and length code 7 to match common machine interfaces in its frame class. An angled (swivel) connector routes the connection laterally, which can make cable routing easier where rear clearance is limited. A special-purpose holding brake locks the smooth shaft when power is removed to reduce drift on vertical or suspended axes. For travel beyond one revolution, the encoder stores multi-turn 4096 revs, so the axis can retain absolute turn information after shutdown. The unit is supplied without an oil seal, uses revision 3 electronics, mounts by flange, and relies on the reinforced A-side bearing for long-term mechanical stability.