8LSN55.EB020D700-0 by B & R Automation

The 8LSN55.EB020D700-0 is a synchronous servo motor produced by B&R Automation for the 8LS Synchronous Motors series. As a drive element, it supplies accurately regulated torque and speed to automated axes, allowing precise positioning and process control on assembly cells, packaging stations, and material-handling equipment. Its 8LSN designation associates the unit with a mounting-flange interface that streamlines integration into machine frames and supports direct coupling to gearboxes or belt transmissions without additional adapter plates.

The motor uses a three-phase synchronous winding system, and its rotor is rated for a nominal velocity of 2000 rpm, which sets the base point for speed-torque curves used in drive sizing. A self-cooling housing removes heat without auxiliary ventilation, and the motor's increased mass moment of inertia helps damp load disturbances during cyclic duty. The motor has a 142 mm flange consistent with IEC sizing conventions, which supports installation on common machine interfaces. For feedback, an Inductive EnDat encoder operating on the EnDat 2.1 protocol supplies absolute position data through a bidirectional serial link, which simplifies cable routing and position acquisition.

The feedback system resolves shaft position to 19/12-bit resolution, and encoder memory tracks a multi-turn range of 4096 revolutions, allowing startup after power loss without a homing cycle. Power and signal leads exit through an angled swivel connection, which eases cable routing in tight cabinets. Because there is no holding brake, static load retention must come from the drive's torque-locking function or an external clamp when required. An oil seal at the shaft minimizes lubricant egress, while the keyed shaft end provides positive torque transmission to couplings. Length code 5 indicates the stack height used for this inertia class, and the motor is supplied in a standard configuration without optional accessories.