8JSA53.E6040D701-1 by B & R Automation

The 8JSA53.E6040D701-1 belongs to the 8JS Synchronous Motors series manufactured by B&R Automation. This motor is intended for industrial automation tasks that require tight velocity and position control, such as coordinated robot axes or high-speed packaging stations. By combining a permanent-magnet rotor with an integrated optical encoder, it feeds real-time rotational data back to the drive so that the control loop can regulate torque and synchronize motion with adjoining axes. This feedback arrangement also helps the axis respond cleanly to changing loads during synchronized machine movement.

The unit's nominal speed is 4000 rpm, giving the axis a broad operating range before field weakening is necessary. A self-cooling housing removes heat by natural convection, so no external blower or liquid circuit is needed. Position feedback is delivered through an optical EnDat 2.1 interface that streams absolute angle information with a precision of ±20 arcsec. Internally, the incremental track carries 2048 lines, and a 13-bit single-turn word supplements the serial position data for high-resolution interpolation inside the drive controller. Because the encoder is single-turn, the drive can process absolute position within one mechanical revolution without storing turn counts.

Mechanical integration centers on flange mounting, so the stator can bolt directly to a machine frame while maintaining coaxial alignment. Power and feedback cables exit through an angled swivel connector, which helps cable routing where rear clearance is limited. The output shaft uses a keyed shaft profile to lock pulleys or couplings and is protected by an oil seal that helps keep lubricant inside adjacent gear stages. The motor uses size code 5 and length code 3 for a mid-range balance of torque density and inertia. It is supplied without a holding brake, so vertical installations must rely on external clamping or drive torque when power is removed.