Automation and Drives - SCE
T I A Training Document Page 13 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
Modularity
SINAMICS G120 is a modular converter system that consists of different functional units. The two
basic building blocks 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
control modes that can be selected. It supports communication with a local or central controller as
well as with monitoring devices. In addition to controlling, other functions are available that can be
adapted to the respective application through corresponding parameter assignment.
The control units are available in the following types:
● Standard CUs (CUs without safety oriented functions)
– CU240S
– CU240S DP like the CU240S but with PROFIBUS DP interface (PROFIdrive Profile 4.0)
– CU240S PN like the CU240S but with PROFINET interface (PROFIdrive Profile 4.0)
● CUs with safety oriented functions
– CU240S DP-F like the CU240S DP but with integrated safety oriented functions
The Power Module provides the motor with a performance range of 0.37 KW to 90 KW. The control
unit controls the power module by means of a micro processor. For highly reliable and flexible
motoring, the most modern IGBT technology with pulse width modulation is used. Comprehensive
protection functions provide a high measure of protection for the power module and the motor.
The power modules are available in the following types:
● Power Module PM240 with DC braking functions, supply voltage 3 AC 400V
The PM240 has an integrated brake chopper, and is designed for drives without power recovery for
the network. Possible regenerative energy is converted into heat by means of brake resistors that
are connected externally.
● Power Module PM250 with energy regeneration capability, supply voltage 3 AC 400V
● Power Module PM260 with energy regeneration capability, supply voltage 3 AC 690V
Power modules PM250 and PM260 have an innovative circuit concept which makes line
commutated power recovery possible. This innovation allows for returning regenerative energy to the
network, and thus saves energy.
Control units and power modules can be combined into any configuration. In this training document,
the control units CU240S DP and CU240S PN are described, together with the Power Module
PM240.