8JSA22.E5B35D704-0 by B & R Automation

The 8JSA22.E5B35D704-0 is a synchronous servo motor manufactured by B & R Automation within the 8JS Synchronous Motors series. It supplies closed-loop rotary motion for automated stations that require accurate positioning, speed control, and repeatable torque delivery. By pairing the stator's three-phase windings with an integrated optical encoder, the unit fits directly into B & R drive systems used on conveyors, pick-and-place axes, and other coordinated machinery. Its compact servo design also suits machines that need repeatable motion without separate external feedback hardware.

An angled swivel connector routes power and feedback leads away from the housing, easing cable management in tight cabinets. Heat is removed through a self-cooling aluminum frame, eliminating fans or liquid circuits. Position feedback accuracy reaches ±60 arcsec, and the digital scale offers 13/12 (bits S/M) resolution, supporting fine interpolation inside the controller. The absolute counter records 4096 revolutions, so the drive can retain position information across many shaft turns. Size code 2 and length code 2 give the rotor moderate inertia for mid-range load profiles. The shaft end uses an oil seal, and the motor is supplied without a holding brake. Static holding must therefore be provided externally when the axis is at rest.

Communication between the encoder and drive relies on the Optical EnDat 2.1 protocol, allowing digital exchange of position data and encoder information over a single link. The encoder's multi-turn counter maintains absolute position across repeated revolutions. Installation to a machine frame is achieved through the flange mounting interface, and torque is transmitted through a keyed shaft that resists slippage under cyclic load. An internal oil seal keeps grease inside the bearing cavity and helps protect internal components from dust or coolant splash in factory environments.