SIEMENS
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Siemens D 21.4 · 2017
SINAMICS S120 drive system
Chassis format
7
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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 DRIVE-CLiQ digital system
interface.
The following drive units are available in the chassis format:
•
Power Modules
•
Basic Line Modules
•
Smart Line Modules (only available in the air-cooled version)
•
Active Line Modules
•
Active Interface Modules
•
Motor Modules
Power Modules
The simplest version of a SINAMICS S120 drive system com-
prises a CU310-2 Control Unit and a Power Module.
In Power Modules specifically designed for single drives without
regenerative feedback into the line supply, the line-side infeed
and the motor-side power unit are combined in one unit.
Generated energy produced during braking is converted to heat
in braking resistors.
The Control Unit is plugged onto the Power Module; in addition
to the complete control intelligence, the Control Unit also has all
the drive interfaces for communication with higher-level systems
and interfacing of add-on components.
Line Modules
Line Modules contain the central line infeed for the DC link.
Various Line Modules can be selected to address the various
application profiles:
•
Basic Line Modules
•
Smart Line Modules
•
Active Line Modules
Basic Line Modules
Basic Line Modules are designed only for infeed operation, i.e.
they are not capable of recovering energy to the line supply. If
regenerative energy is produced, e.g. when drives brake, it must
be converted into heat using a Braking Module and a braking
resistor.
A line filter can be optionally installed in order to ensure com-
pliance with the limits stipulated for Category C2 in EN 61800-3.
Smart Line Modules
Smart Line Modules can supply energy and return regenerative
energy to the supply system. A Braking Module and braking
resistor are required only if the drives need to be decelerated
in a controlled manner after a power failure (i.e. when energy
cannot be recovered to the supply). For an infeed using a Smart
Line Module, the appropriate line reactor is required.
A line filter can be optionally installed in order to ensure com-
pliance with the limits stipulated for Category C2 in EN 61800-3.
M
3 ~
~
~
G_D211_XX_00042
Power
Module
Control
Unit
DRIVE-CLiQ
M
3
=
G_D211_EN_00032a
Switch disconnector
and fuses or
circuit-breaker
Line
reactor
Line filter
Main
contactor
Basic Line
Module
Motor
Module
. . .
M
3
. . .
=
Bypass contactor
Motor
Module
Smart Line
Module
Line
reactor
Switch
disconnector and
fuses
G_D213_EN_00033a
Line filter
© Siemens AG 2017