120MB series AC servo motor, high precision, high speed
This manual presents the technical data for the 120MB series alternating AC servo motors, including rated output power, torque, speed, inertia, encoder type and physical dimensions for each model variant (e.g., 120MB040A, 120MB075B). It also lists the compatible driver modules and part numbers.
Installation and safety instructions cover motor mounting, coupling handling, brake‑equipped motor wiring, and connection of the 24 VDC brake control line. Contact information for Hollysys Electric and service hotlines are provided at the end of the document. This manual is written in Chinese.
| Rated torque | 3.82‑9.55 N·m (depending on model) |
|---|---|
| Rated speed | 1000 rpm (standard models) |
| Motor rotor inertia | 7.2‑17.2 kg·cm² (depending on model) |
| Encoder resolution | 2500 pulses per revolution |
| Weight | 4.6‑10.6 kg (depending on model) |
Connect the brake control wires to a 24 VDC power source (2 A) without regard to polarity; the control lines share the same 7‑pin aviation connector as the power lines.
All models use a 2500‑pulse per revolution encoder.
Do not hammer the motor shaft when installing or removing couplings, and ensure the shaft is properly aligned to avoid vibration and bearing damage.