8LSN55.EB030D000-0 B & R Automation
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The 8LSN55.EB030D000-0 is a three-phase synchronous motor manufactured by B & R Automation as part of the 8LS Synchronous Motors series. It features self-cooling, an increased mass moment of inertia, and a mounting flange with a flange dimension of 142 mm. The motor has a rated speed of 3000 rpm and is equipped with an inductive EnDat 2.1 encoder for multi-turn capability up to 4096 revolutions.
Internal Product Review
The 8LSN55.EB030D000-0 is a B & R Automation three-phase synchronous motor with a well-executed standard configuration. Self-cooling with increased mass moment of inertia supports stable thermal behavior and smooth running at 3000 rpm. Inductive EnDat 2.1 feedback with 4096-rev multi-turn capability is a strong technical advantage for precise positioning.
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Product Description:
The 8LSN55.EB030D000-0 is a servo motor produced by B & R Automation for the 8LS Synchronous Motors series. It functions as a compact rotary actuator that can couple directly to ball screws, pulleys, or gearboxes, delivering controlled motion for assembly lines, packaging machines, and material-handling stations. Its electrical and mechanical interfaces follow common industrial standards, which facilitates integration with compatible drive systems and machine components. The motor supports coordinated multi-axis operation where accurate torque, speed, and position control are required.
The mounting flange is sized for DIN layouts, and its square face measures 142 mm. Power and feedback conductors exit through an angled swivel connector, allowing strain-relieved cable routing where installation space is limited. Torque is transmitted through a smooth shaft, so a clamp or compression coupling can secure the connected load. The motor is supplied in a standard configuration with length code 5, balancing the magnetic stack length against rotor inertia. Its 8LSN frame uses self-cooling, eliminating the need for an external fan under permitted operating conditions. The increased mass moment of inertia can help moderate rapid changes in rotational speed when the connected mechanism experiences varying loads. The motor is supplied without a holding brake or oil seal, so stationary load retention and additional shaft sealing must be provided externally when the application requires them.
Electrically, the unit is a three-phase synchronous machine designed for a nominal speed of 3000 rpm. Position feedback is provided by an integrated inductive EnDat encoder that supports protocol version 2.1. This digital interface transmits cyclic position data and diagnostic information to the connected drive for closed-loop motion control. Encoder resolution reaches 19 bits per revolution, while an additional 12 bits provide multi-turn position depth. The internal counter tracks positions across as many as 4096 revolutions without requiring a backup battery, allowing the drive to retain absolute position information across multiple shaft turns. After power is restored, the absolute feedback data can reduce or eliminate the need for a separate homing movement when the machine control system and application configuration support that function.
