6SE6440-2AD24-0BA1 MICROMASTER 440

SKU: 6SE6440-2AD24-0BA1 Category: Drive

Description
Additional information

The Siemens MICROMASTER 440 (6SE6440-2AD24-0BA1) is a general-purpose variable frequency drive (VFD) belonging to the MICROMASTER 440 series, designed for precise speed and torque control of three-phase induction motors. This particular variant delivers a power output of 4.0 kW and is configured for single-phase 200–240 V AC input, making it suitable for applications where three-phase supply is unavailable. It is part of Siemens' widely deployed MM440 drive family, known for its robust performance in demanding industrial environments.

The 6SE6440-2AD24-0BA1 features a comprehensive control architecture supporting both vector control (sensorless and with encoder feedback) and V/f control modes, enabling flexible adaptation to various motor types and load profiles. It includes integrated RS-485 communication via USS protocol, with optional PROFIBUS, DeviceNet, and CANopen connectivity through plug-in communication modules. The drive incorporates a built-in EMC filter (Class A) and a braking chopper, and supports a switching frequency of up to 16 kHz for reduced motor noise. Parameter memory is stored in non-volatile EEPROM, and the unit features comprehensive protective functions including overcurrent, overvoltage, undervoltage, overtemperature, and ground fault protection.

The MICROMASTER 440 is widely used in manufacturing, material handling, pumping, HVAC, and conveyor applications across industries such as food and beverage, automotive, and general machine building. Its ability to handle high dynamic load requirements and its compatibility with a broad range of induction motors make it a versatile choice for OEM machine builders and plant engineers. The drive's compact footprint and DIN rail or panel mounting options allow integration into space-constrained control cabinets.

Technical Specifications

Power Rating	4.0 kW
Input Voltage	1-phase 200–240 V AC
Input Frequency	47–63 Hz
Output Voltage	0–240 V AC (3-phase)
Output Current (Continuous)	17.5 A
Control Type	V/f control, Sensorless vector control (FVC), Closed-loop vector control
Switching Frequency	2–16 kHz (adjustable)
Communication Interface	RS-485 (USS protocol); optional PROFIBUS DP, DeviceNet, CANopen via module
EMC Filter	Integrated Class A filter
Braking Resistor Support	Built-in braking chopper; external braking resistor required
Protection Rating	IP20
Operating Temperature	0 °C to +40 °C (derating up to +50 °C)
Storage Temperature	-40 °C to +70 °C
Relative Humidity	95% non-condensing
Certifications	CE, UL, cUL, C-Tick
Mounting	Panel mounting or DIN rail (with adapter)
Series/Product Family	MICROMASTER 440

Common Fault Codes

F0001: Overcurrent: Drive output current has exceeded the maximum permissible value.
Check motor cable for short circuits, verify motor parameters match nameplate data, check for sudden load changes, and ensure acceleration ramp time is not too short.
F0002: Overvoltage: DC link voltage has exceeded the permissible limit, typically caused by regenerative energy during deceleration.
Increase deceleration ramp time, enable the Vdc_max controller, verify supply voltage is within specification, or connect an external braking resistor.
F0003: Undervoltage: DC link voltage has dropped below the minimum permissible level.
Check input supply voltage is within specification, inspect input fuses and contactor, and verify the supply is stable under load conditions.
F0004: Drive overtemperature: The drive heatsink temperature has exceeded the permissible limit.
Check ambient temperature is within specification, ensure cooling fan is operating correctly, clean heatsink fins of dust and debris, and verify adequate ventilation clearances around the drive.
F0011: Motor overtemperature: Motor thermal model or PTC/KTY sensor has detected motor overtemperature.
Check motor load and duty cycle, verify motor cooling is functioning, check PTC/KTY sensor wiring and connection, and review motor thermal model parameters (P0626–P0628).
F0041: Motor parameter identification failure: Automatic motor data identification (P1910) has failed.
Verify motor nameplate data entered in parameters P0304–P0311 is correct, ensure motor is connected and free to rotate if required, and re-initiate the identification routine.
F0051: Parameter EEPROM fault: Error detected when reading or writing parameters to non-volatile memory.
Perform a factory reset and re-enter parameters. If the fault persists, the drive control board may require replacement.
F0070: CB (Communication Board) setpoint fault: No setpoint received from the optional communication module within the defined timeout period.
Check fieldbus communication wiring and master controller, verify communication module is correctly seated, and review timeout parameter settings (P2040).

Frequently Asked Questions

What is the input voltage and phase configuration for the 6SE6440-2AD24-0BA1?

This drive is configured for single-phase 200–240 V AC input. Despite the single-phase input, it provides a three-phase output to the motor.

Does the 6SE6440-2AD24-0BA1 include a built-in braking chopper?

Yes, the MICROMASTER 440 4.0 kW variant includes an integrated braking chopper. An external braking resistor must be connected to utilise dynamic braking.

What communication protocols does the MICROMASTER 440 support?

The drive natively supports RS-485 with the USS protocol. Optional plug-in communication modules enable PROFIBUS DP, DeviceNet, or CANopen connectivity.

Can the MICROMASTER 440 operate in closed-loop vector control mode?

Yes, the MM440 supports closed-loop flux vector control when an encoder feedback module (such as the STC or HTL encoder option board) is installed and configured.

What is the protection rating of this drive?

The 6SE6440-2AD24-0BA1 carries an IP20 protection rating, making it suitable for installation inside a control cabinet in a clean, dry environment.

Troubleshooting

Drive displays F0001 (overcurrent) immediately on start-up

Check motor cable insulation resistance with a megohmmeter to rule out cable or winding faults. Verify motor parameters P0304–P0311 match the motor nameplate exactly.

Repair or replace faulty motor cable if insulation failure is found. Correct motor parameters and increase acceleration ramp time (P1120) to reduce inrush current on start-up.

Drive powers up but display shows no output and motor does not run

Check that a valid run command is present on the selected command source (digital input or fieldbus). Verify P0700 (command source) and P1000 (setpoint source) are configured correctly. Confirm no active faults or alarms are present.

Apply a valid run command signal to the configured digital input. Correct parameter settings for command and setpoint sources. Acknowledge any active faults before restarting.

Heatsink overtemperature fault (F0004) occurring during normal operation

Measure ambient temperature inside the control cabinet. Inspect the drive's internal cooling fan for correct rotation and airflow. Check heatsink fins for dust accumulation.

Reduce ambient temperature by improving cabinet ventilation or adding a heat exchanger. Clean heatsink fins with compressed air. Replace the internal cooling fan if it is not operating correctly.

Drive trips on F0002 (overvoltage) during deceleration

Monitor DC link voltage during deceleration using the drive's diagnostic parameters. Confirm deceleration ramp time (P1121) is not too short for the connected load inertia.

Increase the deceleration ramp time (P1121). Enable the Vdc_max controller (P1240) to automatically extend deceleration when DC link voltage rises. If regenerative loads are frequent, connect an appropriately rated external braking resistor.

Operator panel (BOP/AOP) cannot communicate with the drive

Check the panel is fully seated in the drive's front connector. Verify no parameter lock is active (P0003 access level). Attempt a factory reset if the panel was previously used on a different drive.

Reseat the operator panel firmly. If the panel remains unresponsive, test with a known-good BOP. If the drive front interface is faulty, the control board may require repair or replacement.

Condition	Repair, Used, Refurbished, New in box (sealed)