Product Description:

The 8MSA3L.R0-B4 from B & R Automation belongs to the 8MS Three Phase Synchronous Motors series and serves as a torque source for automated machinery that depends on accurately synchronized motion. As a three-phase permanent-magnet unit, it interfaces with drives that read resolver feedback, allowing the controller to maintain tight velocity and position loops on conveyors, pick-and-place modules, or tool spindles that require repeatable cycle times. Power, feedback, and brake wiring exit on the B-side, simplifying cable routing when multiple axes are arranged in series or when the motor is installed near other machine components.

This motor has frame size 3 and length code L, a combination that provides a large relative rated torque. Under nominal excitation, the rotor reaches 3000 rpm, and heat is removed by a self-cooling housing, so no external fan is required. During installation, the shaft can withstand up to 200 N of axial force without jeopardizing bearing life, allowing compatible couplings or pulleys to be installed within the permitted load limit. Position feedback is delivered through a resolver, which resists electrical noise and operates reliably in the high-temperature conditions commonly found near industrial motors.

The unit is supplied without a holding brake, so static loads must be secured by drive-applied torque or an external locking device when the axis is stationary. Output torque is transferred through a smooth shaft end that mates with clamping hubs and backlash-free couplers; an oil seal is not fitted, so the mounting area must remain free of coolant spray and other liquids. Resolver performance includes a nonlinearity of ±1 angular minute and a total precision window of ±10 angular minutes, supporting accurate rotor-position measurement throughout operation. The sensing element follows the BRX resolver standard, allowing direct connection to compatible B & R drive electronics without an additional feedback converter.