M200-02400023A Variable Frequency Drive UNIDRIVE M200 0.7kW 3-ф/380

Control Techniques Unidrive M200-02400023A is a 0.75 kW (Heavy Duty) frequency inverter for a three-phase induction motor. Three-phase 380–480 V input (3-ph/380), three-phase output at the same voltage, 2.3 A continuous output current, 180% overload. Output frequency up to 550 Hz, IP20 enclosure for cabinet mounting.

The drive runs scalar V/f and RFC-A sensorless vector control, carries an onboard PLC (16 kB, IEC 61131-3), and supports Modbus RTU via the AI-485 adaptor and fieldbuses (EtherCAT, CANopen, PROFIBUS) through SI- click-in modules. Note: this build has no built-in brake transistor, so resistor braking needs an external braking module. An internal choke is fitted. For a new-machine replacement we will help you pick a Veichi AC310.

Control Techniques Unidrive M200 — compact general-purpose drive with onboard logic

The Unidrive M200 is the entry-level yet genuinely well-equipped member of Control Techniques' (now Nidec) Unidrive M family. It is a general-purpose AC drive for induction motors: it runs both scalar V/f control (linear Fixed and quadratic Square) and the manufacturer's own RFC-A sensorless vector algorithm. RFC-A is closed-loop current control without a position feedback device — the drive estimates rotor speed and flux from currents, voltages and motor parameters, so it holds torque on start-up and under shock loads better than a plain V/f converter.

What makes the M200 useful in practice

• Onboard PLC. The M200 carries its own controller with a 16 kB user program, programmable in IEC 61131-3 languages. Simple logic (interlocks, counters, start sequences) can be handled without an external PLC — a feature most budget drives in this class lack.
• Flexible communications. RS485/Modbus RTU is available onboard via the AI-485 adaptor, and SI- click-in modules add EtherCAT, CANopen, PROFIBUS, PROFINET, Ethernet and DeviceNet. One drive fits both a simple link and a full fieldbus network.
• 180% overload. The Heavy Duty rating is built for hard starts — conveyors, crushers and machines with high-inertia loads.

Things to check before ordering

Honestly: the Unidrive M200 encodes many options directly in the part number, and you have to read them. The brake transistor (brake chopper) is fitted only on the B format variant; the A format ships "without brake", so dynamic braking with a resistor needs either the right part number or an external braking module. Likewise the internal EMC filter and a keypad potentiometer depend on the variant (the M201 differs from the M200 by an integrated speed-reference potentiometer). Always confirm the exact build by the full part number.

What to fit today

The M200 itself belongs to the Unidrive M platform, which is past its active-promotion phase (the current successors are the M300/M400 with wider functionality). Both the M200 and the whole Unidrive M line remain a great choice as a drop-in replacement for what is already in the cabinet. If you are specifying a drive for a new machine from scratch and are not tied to the Nidec ecosystem, look at our Veichi converters — the versatile Veichi AC310 with vector control and a built-in PLC covers the same jobs, while the compact AC10 suits simple pump and fan drives. We will help you match it to your motor and load.