SIEMENS
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Siemens D 21.4 · 2017
SINAMICS S120 drive system
System overview
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Overview
With its separate power unit and Control Unit, the SINAMICS S120
drive system can be perfectly adapted to a wide variety of
different drive tasks.
The Control Unit is selected according to the number of drives to
be controlled and the required performance level, while the
power unit must be rated to meet the energy requirements of
the system. The connection between the Control Unit and power
unit is made very simply using the digital system interface
DRIVE-CLiQ.
Control Units
CU310-2 PN Control Unit
CU320-2 PN Control Unit
CU310-2 DP and CU310-2 PN Control Units
The CU310-2 Control Unit is used to control a single drive.
A PROFIBUS interface (CU310-2 DP) or a PROFINET interface
(CU310-2 PN) and a TTL/HTL encoder evaluation circuit are
standard features.
CU320-2 Control Unit
The CU320-2 Control Unit is designed to control several drives.
In this case, the following can be operated on a CU320-2 Control
Unit:
•
up to 12 drives in V/f control mode, or
•
up to 6 drives in Servo or Vector control mode.
The CU320-2 Control Unit can be used to establish links be-
tween individual drives and to implement simple technological
functions.
Power Modules
The simplest version of a SINAMICS S120 drive system com-
prises a CU310-2 Control Unit and a Power Module. A line rectifier,
a DC link and an inverter for supplying a motor are integrated in
the Power Module.
Power Module in blocksize format with CU310-2 Control Unit and
BOP20 Basic Operator Panel
Power Modules are designed for single drives which are not
capable of regenerating energy to the supply. Generated energy
produced during braking is converted to heat via braking
resistors.
Power Modules can also be operated via a CU320-2 Control
Unit, a SIMOTION D4x5-2 or a CX32-2 Controller Extension, for
example, if a single drive is added to a multi-axis grouping. In
this case, the Power Modules in blocksize format must be
equipped with the CUA31/CUA32 Control Unit Adapter. This is
connected via DRIVE-CLiQ to the CU320-2 Control Unit, the
SIMOTION D4x5-2 or the CX32-2 Controller Extension. Power
Modules in chassis format can be directly connected to the
Control Unit using a DRIVE-CLiQ cable.
M
3 ~
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G_D211_XX_00042
Power
Module
Control
Unit
DRIVE-CLiQ
© Siemens AG 2017