Product Description:

The SD-A4.140.030-01.000 is a brushless servo motor produced by Bosch Rexroth Indramat as part of the SD Magnet Motors series. In automated lines, it couples to a drive controller to deliver commanded torque and speed, turning electrical vectors into axis motion for material handling, assembly, and packaging equipment. Its magnet construction and integrated sensors provide the quick response needed for closed-loop servo operation in modern factory cells.

At standstill, the shaft can hold 14.0 Nm of torque, giving machines enough reserve to clamp loads without drift. During continuous operation, it reaches 3000 rpm, a rotational speed that aligns with many commercially available gear stages. The built-in brake circuit absorbs up to 293 Ws of kinetic energy, while a 3.3 Ω discharge resistor converts that energy into heat to help prevent overvoltage on the DC bus. Position feedback operates from a symmetric ±15 V DC supply and travels through a 10×0.14 + 4×0.5 mm² encoder cable terminated in a Souriau connector that carries the A, B, C, 1, 2, and 3 incremental signals. Power conductors use a separate 1.5 mm² motor connection, which helps keep motor current isolated from the feedback wiring.

Cabling can be routed up to 100 m without signal repeaters, which suits long conveyor or gantry spans. The rotor uses Ferrite magnets, a material choice that maintains stable magnetic performance over extended temperature ranges. For velocity feedback, a brushless DC tacho generator outputs 2.7 V/1000 rpm with a tolerance of ±5%, supplying the drive with a linear speed reference. A thermistor embedded in the stator activates a thermal trip at 140 °C, giving the controller a clear signal to shut down before winding insulation degrades. This allows the control system to react to rising motor temperature before internal damage occurs.