Product Description:

The SD-A4.140.020-01.000 is a brushless servo motor produced by Bosch Rexroth Indramat for the SD Magnet Motors series. As a permanent-magnet, electronically commutated unit, it delivers precisely metered rotary motion for packaging lines, gantries, and handling modules that demand high positional repeatability. In automated cells, the motor pairs with a tacho generator and encoder feedback to close the drive loop, allowing the controller to monitor speed, correct error, and maintain setpoints under varying process loads.

At standstill, the rotor can supply a holding torque of 14.0 Nm, which helps prevent axial drift when the axis is commanded to stop. Under rated conditions, the shaft reaches 2000 rpm; this nominal speed is the operating point where efficiency, cooling, and commutation are balanced. Speed feedback is proportional to rotation because the integrated tacho produces 2.7 V/1000 rpm ±5%, giving the drive controller an analog signal for fine loop regulation. The resolver and tacho electronics are energized by a symmetrical ±15 V DC supply routed through the dedicated feedback connector. Stator excitation comes from the three-phase power leads that terminate on U2, V2, W2, while ferrite magnets in the rotor shape the magnetic circuit without relying on rare-earth materials.

The power conductors can be up to 1.5 mm² in cross-section, simplifying routing through drag chains on compact machines. Sensor continuity is maintained by the feedback cable, which uses 10 x 0.14 mm² + 4 x 0.5 mm² cores; this multi-pair design carries incremental signals, supply lines, and shielding to suppress noise over runs as long as 100 m. An internal thermostat opens the drive interlock when the winding temperature reaches 140 °C, protecting the ferrite magnets from demagnetization. The motor fits standard SD mounting interfaces.