8LSA55.EB045D200-1 by B & R Automation

The 8LSA55.EB045D200-1 is a three-phase synchronous motor manufactured by B & R Automation for the 8LS Synchronous Motors series. It functions as a rotary actuator in automated assembly cells, conveyors, and packaging equipment where accurate speed and position control are required. The 8LSA designation denotes a standard build without a reinforced bearing, providing a practical balance between compact size and permissible radial load for general machine axes.

Its rated speed of 4500 rpm sets the maximum continuous shaft velocity before torque derating occurs. Position feedback is provided by an Inductive EnDat system in EnDat 2.1, so absolute position is available immediately at power-on and the drive can establish commutation without a separate homing cycle. The encoder delivers 19/12 bit single-turn and multi-turn resolution and can track up to 4,096 revolutions without battery support. The flange has a 142 mm mounting dimension for mechanical attachment. Self-cooling with free air circulation limits thermal rise through surface convection rather than forced ventilation, and all power and signal conductors terminate on a detachable connector so the motor can be disconnected without reopening internal terminations.

The motor includes a standard holding brake that locks the rotor when supply power is removed, preventing back-driving on vertical axes. The cable exit uses an angled swivel orientation, which helps route harnesses around nearby machine hardware without forcing tight bends at the connector. A smooth shaft eases assembly with compression couplings, and the integral mounting flange supports accurate alignment to gearboxes or machine plates. Because no oil seal is fitted, the shaft area should remain outside pressurized lubricant circuits and is better suited to clean, dry mounting zones. Length code 5 indicates the active stack height, and the motor is intended for use with conventional servo inverters.