MS2M04-A0FNN-KMDH1 by Bosch Rexroth Indramat

The MS2M04-A0FNN-KMDH1 is a brushless servo motor produced by Bosch Rexroth Indramat within the MS2M Ultra Compact Motors series. It belongs to the ultra-compact group, which gives it a narrow frame size 4 housing and low rotor inertia for fast load acceleration. The motor is intended for closed-loop industrial automation axes where precise velocity and position control are required, and its optical 23-bit encoder supports both single-turn and multi-turn counting to relay exact shaft angles back to the drive.

It supplies continuous output at a rated speed of 3000 rpm, where the shaft can deliver 2.39 Nm of torque while drawing up to 0.75 kW. The embedded windings exhibit a phase inductance of 5.10 mH, which helps control current rise times and supports smooth vector control. The housing is rated IP65, so dust ingress and low-pressure water jets do not impair operation. Cooling is done through natural convection. The housing accepts 4.75-5.25 V logic power for the encoder electronics, and the M17 quick-lock SPEEDCON connectors allow fast tool-free cabling. Operation remains stable between 0 °C and 40 °C with a peak sound pressure of 65 dB(A).

During acceleration or short overloads, the motor can reach 7.16 Nm of torque, and the winding limits current demand to 4.1 A rms under nominal load. The copper resistance of 0.57 ? at 20 °C sets the baseline for I²R losses, while a torque constant of 0.59 Nm/A links stator current to mechanical output for closed-loop control. An electrically released holding brake rated at 24 V DC secures vertical axes when power is removed, and the double-cable metal lead set routes brake and feedback lines separately from the power conductors. A plain shaft without a sealing ring minimizes friction, and frame length A keeps the overall assembly compact for cabinet-close mounting.