8LSA45.EA030D100-3
The 8LSA45.EA030D100-3 is a rotary servo unit manufactured by B&R Automation for the 8LS Synchronous Motors series. The 8LSA designation indicates the standard configuration without a reinforced bearing, making the motor suitable for medium-duty positioning tasks in automated assembly and material-handling machinery. In automation systems, it serves as the rotary output element for indexing axes, transfer units, and similar motion points that require controlled acceleration and deceleration. It delivers closed-loop torque and speed so that motion controllers can hold position or follow dynamic motion profiles with repeatable accuracy.
At its nominal operating point, the motor reaches 3000 rpm. As a three-phase synchronous motor, its rotor speed follows the frequency commanded by the drive. Heat is removed by self-cooling with free circulation, so no external fan or liquid circuit is required. This cooling method avoids separate blower hardware and supports compact machine layouts. The IEC square mounting flange measures 100 mm, and the power and feedback connections use an angled swivel layout that helps route cables in tight spaces. Electrical termination is provided through a connector interface. Length code 5 indicates a medium stator stack that balances torque output and rotor inertia for general servo duty. The keyed shaft end transmits torque positively, but the motor does not include an oil seal, so the shaft area should be protected from lubricant contamination.
The inductive EnDat sensor provides absolute feedback with a resolution of 19/0 bits, which means it supplies 19-bit single-turn data and no multi-turn count. It communicates through protocol version 2.1. Because the encoder is single-turn, the controller receives position data for one mechanical revolution, which suits axes that reference home regularly during operation. No holding brake is installed, so static loads must be restrained by the drive or by external mechanics during power loss. The unit is product revision 3.
