Sinamics G120

The new SINAMICS G120 series of frequency converters is designed to provide precise and cost-effective speed/torque control of AC motors.

With different device versions (frame sizes FSA to FSF) in an output range of 0.37 kW to 90 kW, it is suitable for a wide variety of drive solutions.

Modularity

SINAMICS G120 is a modular converter system comprising a variety of functional units. The two main units are

• the Control Unit (CU) and
• the Power Module (PM)

The Control Unit controls and monitors the Power Module and the connected motor in several different modes. It supports communication with a local or central controller and with monitoring equipment or input/output terminals for a direct control function.

The Power Module supplies the motor in the power range 0.37 kW to 90 kW. The Power Module is controlled by a microprocessor in the Control Unit. State-of-the-art IGBT technology with pulse-width-modulated motor voltage and selectable pulse frequency is applied to achieve extremely reliable, flexible motor operation. An extensive range of protective functions afford a high degree of motor protection.

Furthermore, a large number of additional components are available, such as:

• Basic Operator Panel (BOP) for basic programming and copying of drive parameters
• Line filter, classes A and B
• Line reactors
• Braking resistors
• Output reactors for long motor cables

Safety integrated

The SINAMICS G120 range includes converters for safety-oriented applications. All Power Modules are designed as intrinsically failsafe. A Safety Integrated Drive can be created by combining a Power Module with the relevant Failsafe Control Unit.

The SINAMICS G120 fail-safe frequency converter provides four safety functions, certified in accordance with EN 954-1 Cat. 3 and IEC 61508 SIL 2:

• Safe stop 1 (SS1)
• Safely limited speed (SLS)
• Safe brake control (SBC)
• Safe torque off (STO)

New cooling concept and varnishing of electronic modules

Significant increase in service life or useful life is achieved by the new cooling system and varnishing of the electronic modules. These features are based on the following principles:

• Disposal of all heat losses via an external heat sink
• Electronic modules not located in air duct
• Natural cooled electronic components
• Standardized convection cooling of Control Unit
• All cooling air is directed through the heat sink

STARTER drive/commissioning software

The STARTER drive/commissioning software supports the commissioning and maintenance of SINAMICS G120 converters. It provides operator guidance designed to simplify and speed up commissioning, combined with comprehensive, user-friendly functions for the relevant drive solution.