8LSA54.DB020S900-3 by B & R Automation

B&R Automation's 8LSA54.DB020S900-3 belongs to the 8LS Synchronous Motors series and serves as a drive element for positioning and velocity control in automated machinery. As a three-phase synchronous motor, it produces steady torque across a broad speed range, making it suitable for servo axes that require precise electrical commutation and direct mounting to a mechanical load. This arrangement supports compact machine designs where accurate motion and consistent speed regulation are both required. It also combines mechanical and feedback features that simplify wiring in modular machine layouts.

The motor uses a 142 mm flange and a length code of 4, allowing installation on standard mounting faces without spacers. The 8LSA standard construction without a reinforced bearing configuration uses conventional bearings for the intended radial loads. Cooling is provided by self-cooling with free circulation, so ambient airflow removes heat while the motor operates at a rated speed of 2000 rpm. A standard holding brake maintains axis position when power is removed. The shaft is keyed for positive torque transmission, an oil seal helps limit lubricant migration, and electrical termination is handled through a circular connector that mates with the control cabinet harness. Product revision 3 indicates component updates limited to form and fit compatibility.

Signal transmission and power delivery share one line through a single-cable hybrid connection, which helps reduce routing complexity in moving cable systems. Feedback is provided by an inductive EnDat encoder that supports EnDat version 2.2 and delivers 19/12 bits of single-turn and multi-turn resolution. The encoder tracks up to 4096 revolutions without a battery, which supports absolute positioning over extended travel after power is removed. This hybrid interface works with the motor's internal inductive sensing elements while keeping the housing compact and reducing the number of external cable runs.