Siemens G120 Intermediate Circuit Components Brake Resistors, Power Components on the Output Side

Automation and Drives - SCE

•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

	Preface	Notes	Startup with PROFIBUS	Startup with PROFINET	Program Example
T I A Training Document			Page 15 of 147		Module
			H01
Issued: 02/2008			Frequency Converter SINAMICS G120 on PROFIBUS DP and PROFINET