Siemens SINAMICS S120 Equipment Manual page 94

Line Modules
3.3 Smart Line Modules
Components of the Smart Infeed
A Smart Infeed comprises a Smart Line Module and an external line connection, which
comprises bridging contactor, precharging input circuit, fuse, and line reactor.
Figure 3-9 Overview of Smart Infeed
Operating principle
One or more Motor Modules can be connected to the power supply network via the Smart
Line Module. The Smart Line Module provides the DC link voltage for the Motor Modules.
The regenerative feedback capability of the Smart Line Module can be deactivated by
parameterization.
The Smart Line Module is suitable for direct operation both on TN and on IT and TT
systems.
In generator mode, the Smart Line Module feeds regenerative energy into the supply
network.
The Smart Line Module is used for:
● Machines with medium dynamic requirements
● Infrequent braking cycles and high braking energy
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Manual, (GH3), 10/2008, 6SL3097-2AE00-0BP3
Chassis power units