Experience powerful and precise motor speed control with PowerFlex 4M Single-Phase Input Frequency Controllers by Allen Bradley. These compact, cost-effective inverter drives are perfectly suited for machine level control. PowerFlex 4M drives offer application flexibility, feed through wiring and ease-of-programming to provide you with a streamlined and highly efficient motor control solution.

This drive is available in three frame sizes: A, B, and C, with power ratings from 0.2 to 11 kW (0.25 to 15 Hp) and in voltage classes of 120, 240 and 480 volts. Its ventilation system is only activated during motor operation, and it is silent when stopped, ensuring long service life.

• Pulse Width Modulation Frequency adjustable to 10 kHz for quiet operation
• DIN rail mounting feature on A and B frame drives
• Integral keypad included
• Ambient temperatures up to 50 °C (122 °F) permitted with minimal spacing between drives
• Side-by-side Zero Stacking™ Drives for ambient temperatures up to 40 °C (104 °F)
• Integral RS-485 communications
• Ingress Protection level of IP20 with open type enclosure and slip compensation for enhanced stability
•Drive overload protection and ramp regulation

An Inverter Drive (also known as AC Drive, Variable Frequency Drive, or VFD) is a motor drive device which regulates the amount of power supplied to a motor, allowing for precise control of speed or torque to the motor to suit its application. They are situated between an electrical supply and a motor. Electrical motors run many things we use in our society today and inverter drives are used for speed control in a range of applications, such as simple fan and pump loads. Inverter drives are also used widely in industrial applications for high torque machine control. Most inverter drives now have features such as digital operation and LED displays allowing for easy set-up, monitoring, and adjustment of parameters by the user.

Inverter drives are controlled by inputting specific frequencies or parameters into the device. When power goes through the drive the inverter adjusts the frequency and voltage that is supplied to the motor. They ensure that an electrical motor receives only the necessary amount of power it requires to function, in order to reduce waste or loss of electrical energy, thereby making it more efficient to run. They can also gradually ramp up power for a slower, safer machine start up. Inside the inverter, incoming AC power is converted to DC power via a rectifier made up of diodes, which is then smoothed to a clean, constant voltage by capacitors, and is then fed back out as AC power via output transistors.

Adjust the speed of your AC (alternating current) motor with this inverter drive from Rockwell Automation's Allen Bradley range. It's simple to programme the device and change functions, thanks to the user-friendly keypad and LCD (liquid crystal display). A quick-start option and feed through wiring mean you can get it set up and running with minimal fuss. The built-in RS-485 communications system gives you the freedom to add extra controls and network it with a computer when you need to.

• Ventilation system only operates when motor is in use, reducing noise and wear• Overload protection prevents damage from high currents• Adjustable PWM (pulse width modulation) frequency up to 10kHz means it operates quietly

• CE (Conformité Européenne)• UL (Underwriters' Laboratories)• EAC (Eurasian Conformity)

This inverter drive is a compact choice at just 174mm in length and 72mm in width. It needs minimal spacing between devices and is side-by-side mountable without gaps when it's used in ambient temperatures up to +40°C.