8MSA4M.E3-V40C B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8MSA4M.E3-V40C is part of the 8MS Three Phase Synchronous Motors series and features self-cooling and medium relative rated torque. This motor uses EnDat inductive encoder technology with multi-turn capability, supporting 4096 recognizable revolutions and an encoder frequency limit of at least 6 kHz.
Internal Product Review
The 8MSA4M.E3-V40C is a well-executed B & R Automation three-phase synchronous motor with self-cooling and medium rated torque. The EnDat inductive multi-turn encoder gives this motor dependable feedback behavior in controlled motion service. Recognition across 4096 revolutions is a standout capability for accurate position tracking.
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Product Description:
The 8MSA4M.E3-V40C synchronous motor is produced by B&R Automation within the 8MS Three-Phase Synchronous Motors series. It is intended for closed-loop servo axes where position and speed must follow drive commands precisely. The motor converts electrical energy into controlled rotary torque for conveyors, pick-and-place heads, indexing tables, and other industrial automation equipment. Its synchronous operation allows the connected servo drive to regulate movement accurately under changing speed and load conditions.
Thermal management relies on a self-cooling design, so the housing dissipates generated heat without additional fans or external liquid-cooling circuits. The feedback device has a carrier frequency of ≥ 6 kHz at the point where signal amplitude drops by 3 dB, supporting responsive position measurement. Its angular error is limited to ±400 arcseconds, which helps the motion controller maintain registration during printing, cutting, or coordinated transfer operations. The scanning head detects shaft movement using 32 lines per revolution, and internal interpolation provides the drive with finer position increments for smoother velocity regulation. Feedback is supplied through an EnDat inductive encoder, which provides digital position transmission with resistance to electrical noise commonly found near motor and power cables.
The encoder uses a multi-turn design that retains absolute shaft position across power cycles, reducing the need for a homing sequence after startup. It can track absolute position over 4096 shaft revolutions, allowing the controller to identify the axis location throughout an extended range of rotation. The Size 4 frame provides a square flange and a mechanical envelope suited to midrange transport, handling, and positioning axes. Its M length code indicates an extended magnetic stack that supports greater torque within the available motor frame. Drive selection and tuning can account for a medium relative rated torque, providing balanced torque capacity for applications that require controlled acceleration and repeatable motion. The flange format supports rigid machine mounting, while the motor length accommodates applications that need additional output without moving to a larger frame size.
