8JSA52.EB025D900-0 by B & R Automation

B & R Automation manufactures the 8JSA52.EB025D900-0 for its 8JS Synchronous Motors series. The unit is a permanent-magnet synchronous motor intended to generate controlled torque and speed for machinery axes in automated assembly, material handling, and packaging cells. Integrated feedback and a built-in brake allow the motor to position loads accurately while holding them secure during power-off intervals. This arrangement supports closed-loop motion on axes that must start, stop, and hold position with consistent repeatability during normal machine operation.

The mechanical layout combines a motor size 5 frame with a motor length code of 2, giving a compact form factor that attaches directly to gearboxes or machine plates through flange mounting. Power and feedback conductors exit through an angled swivel connector, which eases cable routing inside tight enclosures. Thermal energy is removed by the motor's own airflow because the design is self-cooling, so no external fan or liquid circuit is required. During operation, it can sustain a nominal shaft velocity of 2500 RPM, and when stationary its standard brake supplies 14.5 Nm of holding torque to lock the axis. A keyed shaft end transmits torque, and an oil seal helps limit lubricant migration into the stator enclosure.

The position loop is served by an Inductive EnDat 2.1 encoder that provides multi-turn feedback. The sensor counts up to 4096 electrical revolutions and resolves each turn with 19/12 bits in the single-turn and multi-turn layers, supplying fine granularity for coordinated drives. Positional deviation is held within ±180 arcsec, which supports repeatable alignment in indexing tables, gantry axes, and synchronized conveyor tracking. Because absolute position remains available after a power cycle, the motor can return to controlled motion without a reference move before normal axis commands resume.