R911261704 (MDD090C-N-030-N2L-130GA1)

The holding brake mechanically locks the shaft when power is removed, preventing movement under load; this is useful in applications requiring fail‐safe holding or emergency stops. However, brake release time and wear must be considered, and the system must supply enough energy (voltage/current) to engage/disengage reliably.

The motor is sealed with shaft seal and uses natural convection and surface cooling in standard housing design. High ambient temperatures or heavy continuous loading reduce cooling effectiveness, so one must derate torque or ensure enhanced ventilation in harsh conditions.

Nominal 3000 min⁻¹ is the designed operating speed; pushing above increases centrifugal stress, bearing heating, and torque drop (due to back EMF and motor inductance). Cooling, rotor inertia, mechanical load balance, and drive capability are limiting factors for speed overshoot.

Because the DSF feedback module and internal components are sealed and not serviceable, any damage or drift in the feedback encoders typically requires factory service or full replacement. Regular inspection of cable integrity, vibration, and operating environment is critical to avoid premature failures.

Each segment of the code identifies performance/hardware parameters: for example, “090” is the size class (which influences torque/inertia), “C” is the length code, “030” relates to winding and speed rating, “N2L” to feedback and mounting features, and “130GA1” to centering diameter, brake, shaft sealing, or configuration. Reading the code lets you verify compatibility with existing systems and choose correct matching motor variants