8MSA5L.E1-D4 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The 8MSA5L.E1-D4 is a three phase synchronous motor from B & R Automation's 8MS series, featuring a nominal rated speed of 3000 rpm and a large relative rated torque. It is self-cooled, has a smooth shaft end, and comes equipped with a multi-turn EnDat encoder offering 512 lines of resolution and ±60 seconds of precision. The motor also includes a holding brake with 15 Nm torque and supports top connection direction.
Internal Product Review
The 8MSA5L.E1-D4 is a three-phase synchronous motor from B & R Automation, featuring a top connection direction and self-cooling system for dependable, maintenance-friendly operation. Equipped with a multi-turn EnDat encoder offering ±60" precision and 512-line resolution, this motor ensures accurate position feedback. The included holding brake provides 15 Nm torque, making this model a strong choice for high-precision automation tasks.
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Product Description:
The 8MSA5L.E1-D4 electric motor is produced by B&R Automation and belongs to the 8MS Three Phase Synchronous Motors series. This three-phase synchronous motor converts drive inverter current into rotary motion for machine tools, pick-and-place modules, and general material-handling axes that require coordinated positioning. Integrated digital feedback, a holding brake, and standardized cabling make the unit suitable for automated cells that depend on repeatable motion and steady axis control. Its layout supports compact installation while allowing the drive system to manage speed and position through closed-loop operation.
At its nominal operating point, the rotor reaches 3000 rpm, a speed that suits common servo inverter outputs and supports rapid indexing without overspeeding the mechanical drivetrain. Heat generated in the stator windings is removed through self-cooling, so no external fan or liquid loop is required when the motor operates within its rated load range. Position data comes from an EnDat optical encoder with 512 lines per revolution, and drive interpolation helps produce smooth velocity regulation during low-speed and dynamic motion. The encoder’s differential signals maintain full amplitude to ≥ 100 kHz at -3 dB, which helps preserve signal quality over longer cable runs to the controller.
During power-off events, a permanent-magnet brake supplies 15 Nm of holding torque to help prevent vertical or suspended axes from drifting. The feedback device uses a multi-turn design that stores absolute position over 4096 revolutions, which reduces the need for homing after startup. Power, brake, and encoder leads exit at the top of the housing, an orientation that can simplify cable routing in dense machine layouts. A smooth shaft end mates with clamp couplings, and mechanical precision is supported by an angular error window of ±60 arcseconds. The Size 5, Length L frame provides high relative rated torque with low inertia, and no oil seal is installed at the output.
