Siemens Frequency inverters MICROMASTER – MICROMASTER 420
The MICROMASTERs are a range of frequency inverters for controlling the speed of three phase AC motors. With their default factory settings they cover a large range of simple motor control applications. Via its comprehensive functionality they can also be used for advanced torque control applications.
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.
MICROMASTER 420 Design
The MICROMASTER 420 has a modular design. The operator panels and communication modules can be easily exchanged without requiring any tools.
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
Overload current 1.5 x rated output current (i.e. 150 % overload capability) for 60 s, cycle time 300 s
Inverter overtemperature protection
Motor protection using PTC via digital input (possible with supplementary circuit)
Earth fault protection
I2t motor thermal protection
Locked motor protection
EMC filter, Class A/B
Line commutating chokes
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
Cyrillic Advanced Operator Panel (CAOP) with Cyrillic, German and English plain text display
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/XP Professional
TIA integration with Drive ES
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
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
Latest IGBT technology
Digital microprocessor control
Flux current control (FCC) for improved dynamic response and optimized motor control