Product Description:

The 07.M4.C2D-3420 is a variable frequency drive manufactured by KEB within the M4 Variable Frequency Drives series. By varying the output frequency and voltage delivered to a three-phase induction motor, the device provides precise speed control, reduced inrush current, and energy savings for automated conveyors, pumps, and fan assemblies. Its role in industrial automation is to let a PLC or local analog reference dictate motor behavior without mechanical throttling devices. This arrangement helps the connected motor respond smoothly to changing process demand during normal machine operation. It is suited to equipment that benefits from adjustable acceleration and steady running speed.

This model operates from a 3-phase supply in the 400 V class and delivers a nominal output current of 2.1 A to motors rated up to 0.75 kW. The internal inverter switches at 4 kHz, balancing acoustic noise with switching losses. Under nominal load, the unit dissipates 54 W, which is useful for cabinet heat calculations. Analog process signals enter through a 40 kΩ input, while feedback to external indicators is provided by a 5 mA maximum analog output. This combination supports straightforward interface wiring with standard control devices. A factory-installed line filter limits conducted emissions, and the relay contact can switch 30 V DC at 1 A for run status or fault signaling. After power removal, the DC link capacitors fall to a safe level within five minutes.

Continuous operation is allowed up to 45 °C ambient, provided the heat-sink surface remains at or below 70 °C. Installation sites up to 2000 m above sea level are supported, and higher elevations require output derating of 1 percent for every additional 100 m. The design withstands faults up to 10 kA rms on the mains side when protected by correctly rated fuses. Relay isolation separates interface wiring from the switched contact, and the altitude derating curve helps preserve thermal margin where reduced air density lowers cooling effectiveness.