Siemens: Variable Frequency Drives
MICROMASTER MM440

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The MICROMASTER 440 inverter is a vector drive designed for a variety of demanding variable-speed drive applications. It is especially suitable in applications where dynamic response, torque control, and tight speed regulation are required. The MM440 is characterized by its sensorless and optional closed loop vector control capability. The product combines application oriented programming flexibility and ease of use. The MM440 can interface with a variety of input voltage ranges from 200V to 600V in power ranges from 1/6HP to 250HP.

Main Characteristics

• Ready to install and operate1 right out of the box.
• Simple commissioning macro to easily make changes in factory programming.
• Modular construction allows maximum configuration flexibility.
• Side by side mounting.
• Six fully programmable, isolated digital inputs.
• Two scalable analog inputs can also be used as seventh and eight digital inputs.
• Two fully programmable analog outputs.
• Three fully programmable relay outputs.
• Silent motor operation is possible when using high switching frequencies.
• Complete inverter and motor protection.

Performance Features

• Latest IGBT technology.
• Digital microprocessor control.
• High performance, sensorless vector control system and optional closed loop vector control.
• Auto-tuning for open or closed loop vector.
• Torque control.
• Flux Current Control (FCC).
• Programmable multi-point V/Hz curve, linear V/Hz control, quadratic V/Hz control.
• Binary Connector (BiCo) technology.
• Multiple Drive Data Sets (DDS) and Control Data Sets (CDS).
• High grade PID controller (with auto-tuning) for process control.
• Fast, repeatable digital input response time.
• NPN/PNP Source-Sink control adaptability.
• Programmable acceleration/deceleration, 0s to 650s.
• Multi-curve, adjustable ramp smoothing.
• Flying restart.
• Automatic restart following power failure or fault.
• Fast Current Limit (FCL) for trip-free operation.
• Fine speed adjustment using a high-resolution 10-bit analog input.
• Fully-rated integral Brake Chopper for dynamic braking throughout power range.
• Injection or compound braking for rapid controlled braking.
• Four skip frequencies.
• RS-485 Serial Port with optional RS-232.

Siemens — Your Best Choice

The MICROMASTER MM440 product line is integrated into the Siemens family of drives, motors, and programmable controller automation products. All products are backed by Siemens worldwide service and support capability.

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