Micromaster MM420

  Application

  The MICROMASTER 420 inverter is suitable for a variety of variable-speed drive applications.

  It is especially suitable for applications for pumps, fans and conveyor systems.

  It is the ideal cost-optimized frequency inverter solution. The inverter is especially characterized by its customer-oriented performance and ease-of-use. Its large supply-voltage range enables it to be used all over the world.

  Design

  The MICROMASTER 420 has a modular design. The operator panels and communication modules can be easily exchanged without requiring any tools.

  Main characteristics

  • Easy, guided start-up 
  • Modular construction allows maximum configuration flexibility 
  • Three fully programmable isolated digital inputs 
  • One scalable analog input (0 V to 10 V) can also be used as a 4th digital input 
  • One programmable analog output (0 mA to 20 mA) 
  • One programmable relay output
        30 V DC/5 A, resistive load
        250 V AC/2 A, inductive load 
  • Low-noise motor operation through high pulse frequency, adjustable (observe derating if necessary) 
  • Complete inverter and motor protection 

  Options (overview)

  • EMC filter, Class A/B 
  • LC filter 
  • Line commutating chokes 
  • Output chokes 
  • Gland plates 
  • Basic Operator Panel (BOP) for parameterizing the inverter 
  • Advanced Operator Panel (AOP) with multi-language plain text display 
  • Asian Advanced Operator Panel (AAOP) with Chinese and English plain text dis­play 
  • Communication modules   
    • PROFIBUS     
    • DeviceNet     
    • CANopen     
  • PC connection sets 
  • Mounting kits for installing the operator panels in the control cabinet doors 
  • PC start-up programs exe­cutable under Windows 98/NT/2000/ME/XP Professional 
  • TIA integration with Drive ES 

  International standards

  • The MICROMASTER 420 inverter complies with the requirements of the EU low-voltage guideline. 
  • The MICROMASTER 420 inverter has the CE marking. 
  • Acc. to uL and cuL certified 
  • c-tick 

  Mechanical features

  • Modular design 
  • Operating temperature: -10 °C to +50 °C (+14 °F to +122 °F) 
  • Compact housing as a result of high power density 
  • Easy cable connection, mains and motor connections are separated for optimum electromagnetic compatibility 
  • Detachable operator panels 
  • Screwless control terminals 

  Performance features

  • Latest IGBT technology 
  • Digital microprocessor control 
  • Flux current control (FCC) for improved dynamic response and optimized motor control 
  • Linear V/f characteristic 
  • Quadratic V/f characteristic 
  • Multipoint characteristic (programmable V/f characteristic) 
  • Flying restart 
  • Slip compensation 
  • Automatic restart facility following mains failure or fault 
  • Internal PI controller for simple process control 
  • Programmable acceleration/deceleration, 0 s to 650 s 
  • Ramp smoothing 
  • Fast current limit (FCL) for trip-free operation 
  • Fast, repeatable digital input response time 
  • Fine adjustment using a high resolution 10-bit analog input 
  • Compound braking for rapid controlled braking 
  • Four skip frequencies 
  • Removable "Y" capacitor for use on IT systems (with non-grounded mains supplies, the “Y” capacitor must be removed and an output choke installed) 

  Protection features

  • Overload current 1.5 x rated output current (i.e. 150 % overload capability) for 60 s, cycle time 300 s 
  • Overvoltage/undervoltage protection 
  • Inverter overtemperature protection 
  • Motor protection using PTC via digital input (possible with supplementary circuit) 
  • Earth fault protection 
  • Short-circuit protection 
  • I 2 t motor thermal protection 
  • Locked motor protection 
  • Stall prevention 
  • Parameter interlock