8MSA4S.E3-D2 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8MSA4S.E3-D2 is part of the 8MS Three Phase Synchronous Motors series and features a self-cooling system with a top connection direction. It has a nominal rated speed of 3000 rpm, a smooth shaft end, and a small relative rated torque. This motor uses EnDat Inductive encoder technology with a multi-turn type, offering 32 lines of resolution and up to 4096 recognizable revolutions.
Internal Product Review
The 8MSA4S.E3-D2 is a B & R Automation three-phase synchronous motor that stands out for self-cooling and a 3000 rpm rated speed. An EnDat inductive multi-turn encoder supports accurate feedback and dependable positioning, making this unit a strong choice for servo motion applications.
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Product Description:
The 8MSA4S.E3-D2 is a three-phase synchronous motor manufactured by B & R Automation as part of the 8MS Three Phase Synchronous Motors series. This motor is intended for positioning and speed-controlled applications in industrial automation where compact servo axes are required. Its frame uses motor size 4 with the short “S” length code, providing a moderate continuous torque profile suited to light material-handling stations and small packaging lines. The compact housing also allows the motor to fit into machinery with limited installation space while providing controlled rotary motion for repetitive processes.
The stator winding uses a self-cooling airflow path, so no external fan or liquid cooling circuit is needed to keep the temperature within permissible limits at the rated shaft speed of 3000 rpm. The feedback electronics support frequencies of at least 6 kHz at -3 dB, which allows fast signal processing with modern inverters. Inside the encoder, each mechanical revolution is divided into 32 lines. The encoder uses EnDat inductive sampling, providing a digital position signal that resists contamination and electrical noise. The angular error band is ±400 arc-seconds, making the motor suitable for motion tasks that require moderate positioning precision rather than sub-arc-second measurement accuracy.
The sensor is a multi-turn device that counts up to 4096 revolutions without battery backup, so absolute position remains available after a power cycle. A shaft with a smooth end simplifies connection to low-inertia couplings or timing-belt pulleys. All power and feedback cables exit from the top of the housing, allowing convenient routing when the motor is installed in a vertical cabinet or compact machine frame. The motor does not include a holding brake, so stationary loads must be retained by drive torque or an external mechanism when necessary. It is also supplied without an oil seal and is intended for dry operating areas where liquid contamination at the shaft is not expected. Its relatively low rated torque suits indexing tables, pick-and-place heads, and other light-duty drives that require controlled acceleration and repeatable movement.
