Product Description:

The 8MSA6S.R0-B400-1 three-phase synchronous motor is manufactured by B&R Automation and belongs to the 8MS Three Phase Synchronous Motors series. It converts electrical energy into controlled rotary motion for automated equipment such as indexing tables, pick-and-place heads, and packaging axes. Integrated resolver feedback and a compact frame allow direct use with ACOPOS servo drives. The design is intended for servo-controlled axes that require repeatable speed and position response during frequent starts and stops.

The motor delivers a nominal speed of 3000 rpm, allowing direct coupling to gearboxes or loads that require moderate base velocity. A self-cooling housing dissipates copper and iron losses through natural convection, so no external blower or fluid circuit is needed. Adequate clearance around the housing helps maintain airflow during continuous operation. Power and feedback connectors exit on side B, which helps route cables in compact machines and limits bend strain near the motor. Rotor position is captured by a resolver, a passive transformer that tolerates electrical noise better than optical encoders. The motor has a smooth shaft, which accepts clamp or compression couplings with minimal backlash. The unit is supplied without a holding brake and without an oil seal, so external devices must manage static locking or lubricant isolation when required.

Within the series, this model carries the relative torque class of Small, making it appropriate for axes with low to moderate inertial demands. The motor has a frame size code of 6, while length code S keeps the axial dimension short for installations with depth constraints. The BRX sensor variant offers positional feedback with a nonlinearity of ±1 angular minute, and its cumulative precision window of ±10 angular minutes supports tight electronic gearing among synchronized lanes. The short housing also helps when the motor is mounted near guards, transfer modules, or closely spaced machine frames.