Automation and Drives - SCE
T I A Training Document Page 15 of 147 Module
H01
Issued: 02/2008 Frequency Converter SINAMICS G120 on PROFIBUS DP and PROFINET
Preface Notes Startup with PROFIBUS Startup with PROFINET Program Example
• Intermediate Circuit Components
• Brake Resistors
By means of the braking resistors, excess energy of the intermediate circuit is reduced. The
braking resistors are intended for use with the PM240. It has an integrated brake chopper
(electronic switch).
• Power Components on the Output Side
They allow for longer, shielded motor cable lengths for operation with output reactors or LC filters
and sinusoidal filters; in addition, the life of the motor is extended.
• Output Reactors
Output reactors reduce the voltage load on the motor winding. At the same time, the capacitive
charge reversal currents are reduced which additionally strain the power unit when longer motor
cables are used.
• LC Filters and Sinusoidal Filters
LC filters and sinusoidal filters limit the voltage rise rate and the capacitive charge reversal
currents that usually occur at converter operation. Output reactors are then no longer needed.
Safety Integrated
The converter built-in units SINAMICS G120 offer variants of safety oriented applications. All power
modules are already fail-safe units. If a power module is combined with a corresponding failsafe
control unit, this drive becomes a Safety Integrated Drive.
The failsafe frequency converter SINAMICS G120 offers four safety functions, certified according to
EN 954-1, Kat.3 and IEC 61508 SIL 2:
• Safe Stop 1 (SS1)
• Safely Limited Speed (SLS)
• Safe Brake Control (SBC)
• Safely switched-off torque (STO)
Innovative Cooling Concept and Painted Electronic Modules
The innovative cooling concept of the electronic module and painting the module extend its life or
use considerably, and results in the following:
• Dissipation of power loss exclusively by means of the external heat sink
• Electronic modules not in the air duct
• Consistent convection cooling of the control unit
• The air flow of the fan blows exclusively through the heat sink
PROFIdrive Profile 4.0
The user data structure of the cyclical/acyclical communication channel is specified for PROFIBUS
and PROFINET in the PROFIdrive Profile, Version 4.0.
The PROFIdrive Profile specifies for the converters how a master/controller can access the
converters (slaves/devices) by means of cyclical or acyclical data transmission.
Note:
PROFIdrive for drive technology is standardized and described in the following document: Literature:
[P5] PROFIdrive Profile Drive Technology