4.1 Short Description of the Micromaster 420

The Micromaster 420 with attached Profibus option module.

The Micromaster 420 without control panel and cover

Short Description

The Micromaster 420 frequency inverter is a device that generates a voltage with altered amplitude and frequency from AC (also three-phase AC) with a specific frequency. This converted voltage is then used to operate the load. The Micromaster 420 allows stepless speed control from zero to above the nominal speed without any reduction in torque. It can be adjusted to the respective motor to be driven through various parameterization options, to operate and protect it optimally. Furthermore, bus-capable expansion modules can also be attached and connected to a network for control and operation.

Technical Data

Micromaster 420 voltage and power
200 - 240 V, ±10%, 1 AC, 0.12 kW - 3 kW
200 - 240 V, ±10%, 3 AC, 0.12 kW - 5.5 kW
380 - 480 V, ±10%, 3 AC, 0.37 kW - 11 kW
Operating temperature: -10 °C to +50 °C
Process control: Internal PI controller
Inputs: 3 digital inputs, 1 analog input
Outputs: 1 analog output, 1 relay output