Digital guide
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B&R 3DM476
Product Name
B&R 3DM476 ACOPOS three-phase servo drive with integrated motion controller, commonly supplied as variant 3DM476.6.
Product Introduction
This drive controls brushless synchronous servo motors in machine automation. It executes position, velocity and torque control, performs sinusoidal commutation, and integrates trajectory planning for single-axis or multi-axis systems.
Detailed content
Rated Power
1.5 kW continuous, 4.5 kW peak for 3 seconds.
Supply Voltage
400 VAC three-phase, operating range 323 to 480 VAC.
Output Current
4.5 A RMS per phase.
Output Frequency
0 to 500 Hz.
Control Modes
Position point-to-point and continuous path, velocity, torque.
Position Resolution
1,000,000 steps per revolution, equivalent to 20-bit encoder feedback.
Fieldbus Communication
POWERLINK, EtherCAT, PROFINET, EtherNet/IP, CANopen.
Encoder Interfaces
EnDat 2.2, Hiperface DSL, BiSS-C, SSI, incremental A/B/Z.
Digital I/O
8 inputs and 4 outputs, 24 VDC.
Analog I/O
2 inputs ±10 V, 1 output ±10 V.
Safety Function
Integrated STO, SIL 2 / PL d per EN 61800-5-2.
Dynamic Features
Onboard trajectory planner, electronic cam, electronic gear, auto motor tuning, notch filter, regenerative brake chopper.
Housing Material
Anodized aluminum alloy chassis with industrial PCB and molded connectors.
Mechanical Structure
Book-style panel or DIN-rail mount, front LED indicators, 4-digit 7-segment display, 6 membrane keys, power terminals, motor U/V/W terminals, encoder connector, I/O connectors and communication ports.
Working Principle
The controller sends position, speed or torque setpoints over the fieldbus. The internal motion controller generates the trajectory, the current loop uses field-oriented control with 62.5 microsecond cycle time, and the IGBT stage outputs three-phase PWM voltage to the servo motor. Encoder feedback closes the position loop.
Operating Temperature
0 to 55 °C.
Protection Rating
IP20 with covers, IP54 optional.
Installation Requirements
Mount on TS35 DIN rail or panel with M4 screws. Connect a dedicated three-phase 400 VAC breaker, C-curve, 10 A. Use shielded motor cable up to 10 m. Use shielded twisted-pair encoder cable up to 20 m. Ground the drive chassis and motor frame to plant earth.
Usage Precautions
Connect only the specified 323 to 480 VAC three-phase supply. Keep ventilation openings clear. Use only B&R Automation Studio approved firmware files. Do not operate beyond 55 °C ambient. Inspect motor and encoder shielding before energizing.
