siemens a&d

micromaster 420

micromaster 420
The MICROMASTER 420 with its default factory settings, is ideal for a large range of simple motor control applications. It is especially suitable for applications for pumps, fans and conveyor systems. The MICROMASTER 420 can also be used for more advanced motor control applications via its comprehensive parameter lists.
The MICROMASTER 420 can be used in both stand-alone applications as well as being integrated into Automation Systems. It is especially characterized by its customer oriented performance and ease of use. In addition, its large supply voltage range enables it to be used all over the world.

Main Characteristics

  • Simple Commissioning
  • Modular construction allows maximum configuration flexibility
  • Three fully programmable isolated digital inputs
  • One scalable analogue input can also be used as a 4th digital input
  • One programmable analogue output (0 mA to 20 mA)
  • One fully programmable relay output
  • Silent motor operation is possible when using high switching frequencies
  • Complete inverter and motor protection

Performance Features

  • Latest IGBT technology
  • Digital microprocessor control
  • Flux control (FCC) for improved dynamic response and optimized motor control
  • Linear V/f control
  • Quadratic V/f control
  • Programmable V/f characteristic
  • Flying restart
  • Slip compensation
  • Automatic restart facility following power or fault
  • PI feedback for simple process
  • Programmable acceleration/deceleration, 0s to 650s
  • Ramp smoothing
  • Fact current limit (FCL) for trip operation
  • Fast, repeatable digital input response time

Protection Features

  • Overload capability 150% of rated load current for a period of 60s within 5 min
  • Overvoltage / undervoltage protection
  • Inverter overtemperature protection
  • Motor protection using PTC via digital input
  • Earth fault protection
  • Short circuit protection
  • Locked motor protection
  • Stall prevention
  • Parameter interlock, using PIN


  • EMC filters Class A/B
  • Line commutating chokes
  • Output chokes
  • Gland plates
  • BOP basic operator panel for parameterising an inverter
  • AOP advanced operator panel with plain text and multi-lingual display
  • PROFIBUS-DP communications module
  • PC connection kits
  • Assembly kits for mounting the operator panels in the control cabinet doors
  • PC commissioning tool, runs under Windows 95/NT
Click Here for Full Price List of Siemens Micromaster 420drives
micromaster 420
micromaster 440
Micromaster 420


Crouzet | Seeka-Takex | Proximity Sensors | Brad Harrison | Siemens | Ege I Omron I Erwin Sick I GOSwitch

Home I Suppliers I Price & Availabilty I Newsletters I Sensor Sourcing I New Products I Special Offers I Site Map I Links I Contact