8MSA4M.E3-33 B & R Automation
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The B & R Automation 8MSA4M.E3-33 is part of the 8MS Three Phase Synchronous Motors series and features a self-cooling system. It is equipped with a multi-turn EnDat inductive encoder with a resolution of 32 lines and a holding brake torque of 8 Nm. The motor operates at a nominal rated speed of 3000 rpm and has a keyed shaft end.
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Product Description:
B & R Automation manufactures the 8MSA4M.E3-33 synchronous motor within its 8MS Three Phase Synchronous Motors series. The unit combines a permanent-magnet rotor, a multi-turn encoder, and a mechanical holding brake in one housing. It drives medium-inertia loads in packaging, pick-and-place, and material-handling stations, delivering closed-loop speed and position control to the connected inverter. Connection terminals are oriented on side A, and the M length code with size 4 balances power density against overall footprint.
At its rated point, the rotor turns at 3000 rpm, a speed selected for general-purpose servo axes. The electromechanical brake supplies 8 Nm of static torque so vertical loads stay fixed when the drive is disabled. Position data travels through an inductive encoder channel that preserves signal fidelity up to ≥ 6 kHz (-3 dB), while each revolution is subdivided into 32 lines to support fine incremental interpolation. Absolute accuracy is maintained within ±400 counts, reflecting the encoder precision class. Thermal energy is removed by a self-cooling housing, eliminating the need for auxiliary fans or liquid circuits. This arrangement supports compact servo installations where external cooling hardware is not desired.
The encoder stores up to 4096 revolutions of the motor shaft, allowing the controller to recover absolute position after power loss without axis movement. The sensing principle is identified as EnDat Inductive, which offers strong immunity to dust and oil compared with optical disks. Mechanical power exits through a keyed shaft end, so torque can be transferred through standard couplings. The connectors remain on side A to keep cable routing concentrated at one end of the motor. An oil seal is not fitted, so the installation should exclude pressurized lubricant environments.
Frequently Asked Questions about 8MSA4M.E3-33:
Q: What type of encoder and position recognition does the 8MSA4M.E3-33 motor use?
A: The 8MSA4M.E3-33 features a multi-turn EnDat inductive encoder, allowing for precise position feedback and recognition of up to 4096 revolutions.
Q: How is the 8MSA4M.E3-33 motor cooled during operation?
A: This model has a self-cooling system, which enables operation without the need for external cooling devices.
Q: What is the holding brake torque for the 8MSA4M.E3-33 motor?
A: The 8MSA4M.E3-33 includes a holding brake with a torque rating of 8 Nm for secure axis holding when powered off.
Q: What is the rated nominal speed of the 8MSA4M.E3-33 motor?
A: The rated nominal speed for this motor is 3000 rpm, supporting moderate-speed applications.
Q: What type of shaft end does the 8MSA4M.E3-33 feature?
A: The shaft end on this model is keyed, providing reliable power transmission and secure coupling to driven components.
