MDD090C-N-030-N2M-110GR2

MDD Synchronous Motors

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The MDD090C-N-030-N2M-110GR2 digital AC servo motor from Bosch Rexroth Indramat is part of the MDD Synchronous Motors series. It features a motor size code of 090, a length code C, a centering diameter of 110 mm, and a nominal speed of 3000 min⁻¹. It delivers 10.4 Nm continuous torque at standstill and 11.0 Nm holding brake torque, with digital servo feedback via an integrated multiturn absolute encoder. The motor has a plain shaft and a right-direction connector interface.

Technical Specifications

Balancing
Standard

Holding Brake
With blocking brake

Holding Brake Torque
11.0 Nm

Centering Diameter
110 mm

Housing
Standard

Encoder
Integrated multiturn absolute encoder

Motor feedback
Digital servo feedback (DSF)

Continuous Torque at Standstill
10.4 Nm

Motor Length Code
C

Motor Size
090

Nominal Speed
3000 min⁻¹

Shaft Seal
With shaft seal

Shaft Type
Plain shaft

Connection Direction
Right

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What does the “N2M” digital servo feedback in the motor imply for control accuracy?

It means the motor includes a multiturn absolute encoder integrated with digital feedback, enabling position memory across power cycles and improved accuracy in closed-loop control. This reduces the need for homing cycles and supports high repeatability in precision applications.

How does the 10.4 Nm continuous torque at standstill affect dynamic motion planning?

It sets a limit on how much static load or inertia you can hold without motion; aggressive accelerations or high inertial loads may push the motor into current-limited operation. In motion profiling, you should budget torque margins to avoid saturation under peak demands.

What is the role of the 11.0 Nm holding brake and when will it be active?

The holding brake engages when power is removed to lock the shaft and prevent drift under load. It is not meant for frequent dynamic braking during motion but for static locking, so wear over repeated cycling should be considered (the brake is not a service brake).

What mounting tolerances or balancing class does this size (MDD 090) come with and why does that matter?

The MDD 090 series is dynamically balanced to “reduced” (R) class by default, which lowers vibration at high speeds—a crucial factor if the motor is part of a rotating spindle or high-speed axis.

Can the encoder connector orientation be changed after installation, and what are the limitations?

Yes, the feedback connector on many MDD motors can be rotated in 90° increments (via repositioning the connector housing) to suit cable routing; however, the main power connector’s orientation must be specified at order time and cannot be changed afterward.

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Internal Product Review

The MDD090C-N-030-N2M-110GR2 motor from Bosch Rexroth includes a digital servo feedback system and multiturn absolute encoder. It delivers 10.4 Nm continuous torque at standstill and features an 11.0 Nm holding brake with a plain shaft and 3000 min⁻¹ nominal speed. This motor is suited for use in robotics, packaging lines, CNC machining, and printing systems.