1. Product Overview

2. Model Code Explanation

• MM: MOVIMOT decentralized drive system

• 15: Rated power 1.5 kW

• B: B-series, second generation

• 503: 3-phase 380–500 V AC power supply

• -00: Standard configuration

• Part number: 8230269

3. Technical Specifications

3.1 Electrical Parameters

• Input Voltage: 3×380–500 V AC (±10%), 50/60 Hz

• Rated Input Current: 3.5 A

• Rated Output Power: 1.5 kW

• Rated Output Current: 4.0 A

• Output Frequency Range: 2 – 100 Hz

• Control Modes: U/f control and basic vector control

• Digital I/O: 4 programmable digital inputs, 2 programmable digital outputs (24 V DC)

• Communication: Integrated RS-485 interface supporting Modbus RTU

• Brake Function: Built-in brake control for SEW brake motors

• Overload Capacity: 150% rated current for 60 seconds

• EMC Performance: No built-in filter; an external Class A EMC filter is required

• PWM Frequency: 8 kHz

3.2 Mechanical & Environmental Parameters

• Protection Class: IP55

• Cooling Method: Natural convection with optimized heat sink

• Dimensions (W × H × D): Approximately 135 × 180 × 105 mm

• Weight: Around 1.4 kg

• Operating Temperature: -25 °C to +40 °C

• Storage Temperature: -25 °C to +70 °C

4. Main Features

• Equipped with onboard RS-485 communication, enabling convenient network control.

• Supports basic vector control, delivering better low-speed torque performance than the A-series.

• Wider operating temperature range and improved heat dissipation structure for higher operational stability.

• Standard IP55 protection grade, suitable for dusty and humid industrial working conditions.

• Simple structure and easy on-site installation and parameter setting.

• Noticeable operating noise due to 8 kHz PWM frequency.

5. Product Status & Replacement

• MM15B-503: Discontinued and no longer in mass production.

• Transitional replacement: MM15C-503 (also discontinued).

• Current standard replacement: MM15D-503-00. The D-series comes with built-in EMC filter, 16 kHz low-noise PWM, optional STO function and extended low-temperature resistance, while keeping full compatibility in mounting and wiring.

6. Typical Applications

• Logistics conveying systems and sorting equipment

• Packaging machinery and auxiliary processing devices

• Industrial fans, water pumps and other general automated machinery

• Maintenance and renovation of old automation systems

7. Installation & Wiring

7.1 Mechanical Installation

1. Mount the unit directly on the flange of SEW DRS, DRE or DRP series motors.

2. Fasten the mounting screws with a torque of 3.0 Nm.

3. Keep unobstructed ventilation around the heat sink and stay away from heat sources.

7.2 Electrical Wiring

1. Power Terminals L1, L2, L3, PE: Connect to 3-phase 380–500 V AC power supply and ensure reliable earthing.

2. Motor Terminals U, V, W, PE: Use shielded cables to connect to the motor terminals.

3. Control Terminals: Connect 24 V DC power, run/stop and direction signals.

4. Communication Port: Connect RS-485 cable for Modbus RTU network communication.

5. EMC Configuration: Install an external Class A EMC filter close to the power input terminals.

8. Commissioning

1. Inspect all wiring and insulation thoroughly before switching on the power.

2. Set motor parameters, I/O logic and communication address via DIP switches.

3. Switch on the main power; steady green LED indicates standby status.

4. Perform trial run at low speed first, check for abnormal noise and vibration, then adjust to normal operating speed.

9. Status Indication & Common Faults

9.1 LED Status

• Steady green: The drive is ready for operation.

• Flashing green: The motor is running.

• Flashing red: Fault alarm is triggered.

9.2 Typical Faults

• Overcurrent: Caused by circuit short circuit, equipment overload or motor failure.

• Overvoltage: Resulted from abnormal input voltage or regenerative voltage.

• Overtemperature: Caused by blocked ventilation or excessive ambient temperature.

• Communication error: Due to damaged RS-485 cable or incorrect address setting.

10. Maintenance

• Clean dust on the heat sink every six months to guarantee heat dissipation.

• Regularly check the tightness of all terminals and the aging condition of cables.

• Replace damaged sealing parts in time to maintain IP55 protection performance.

11. Storage & Disposal

• Store the product in a dry and clean environment within the specified temperature range.

• Dispose of the product in accordance with local WEEE regulations. Sort metal, plastic and electronic components for professional recycling.