8LSA37.SB030S000-3 by B & R Automation

The 8LSA37.SB030S000-3 is a rotary motor manufactured by B & R Automation as part of the 8LS Synchronous Motors series. It serves as a drive element for positioning axes, conveyors, and other motion tasks in industrial automation where closed-loop velocity and position control are required. The motor is delivered as a stand-alone component that pairs with B & R inverters through a hybrid power and feedback line, giving the drive system a single motor-side connection for actuation and control. Its mechanical interface and feedback features match the standard motion platform used across the series.

A rated speed of 3000 rpm establishes the motor's operating speed for typical servo duty and supports common gearbox selections. Position data is supplied by an optical EnDat encoder that uses version 2.2. This interface returns absolute values with a resolution of 19/12 bits for single-turn and multi-turn tracking, so the controller can retain angular information across normal operating cycles. The encoder keeps position over 4,096 revolutions, which removes the need for homing after brief power loss or restart conditions. A mounting flange with a face size of 91.3 mm supports attachment to gearboxes or machine frames, and power and feedback are routed through a locking connector.

The mechanical layout uses a Single-cable solution, so power and encoder signals share one hybrid lead to the controller and cable routing stays compact. The motor has Length code 7, which indicates an extended active stack without increasing the front face of the housing. Because the shaft is a Smooth shaft, couplings are mounted without keys and the output end stays simple. The motor is a three-phase synchronous design, and standard 8LSA construction omits a reinforced bearing, uses self-cooling with free air circulation, and comes without a holding brake or oil seal. The unit is revision 3, which identifies the current build level of this version.