Siemens SINAMICS S120, Function Manual

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Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
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Infeed
2
Infeed units (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:
● Active Line Modules (ALM)
● Basic Line Modules (BLM)
● Smart Line Modules (SLM)
The devices are parameterized in Startdrive using the "Infeed" drive object.
Active Line Module
Active Line Modules can supply energy and return regenerative energy to the line supply. 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 fed back to the line
supply). When feeding in with the Active Line Module, a line reactor or an Active Interface
Module is required.
Basic Line Module
Basic Line Modules are only suitable for infeed operation, i.e. they cannot feed regenerative
energy back into the grid. If regenerative energy accrues, e.g. when braking the drives, it
must be converted to heat via a Braking Module and a braking resistor.
Smart Line Module
Smart Line Modules can supply energy and return regenerative energy to the line supply. 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 fed back to the line
supply). When a Smart Line Module is used as the infeed, the matching line reactor must be
installed.