Siemens SINAMICS S120 Function Manual page 847

The following applies when connecting Motor Modules in parallel:
● A parallel connection is only permitted in the chassis format and only in the vector control
● A maximum of four Motor Modules are permitted in a parallel connection. All Motor
● A drive object is created for a parallel connection.
● Only one parallel connection exactly is permitted per Control Unit.
Line Modules:
For the CU310-2 Control Unit the following applies:
● Operating Line Modules is not permitted
For the CU320-2 Control Unit the following applies:
● Only one drive object of the Smart Line Module (SLM), Basic Line Module (BLM) and
● Mixed operation of an Active Line Module with a Smart Line Module (SLM) or with a Basic
● Mixed operation of a drive object of the Smart Line Module (SLM) type with a drive object
● An active Voltage Sensing Module (VSM) must be assigned to each active Active Line
● Two further Voltage Sensing Modules can be operated with the "network transformer"
The following applies to parallel connection of Line Modules:
● Parallel connection is permitted for Infeed Modules in the chassis format and for Active
● A maximum of four Infeed Modules are permitted within a parallel connection.
● In booksize format, a maximum of two Active Line Modules (ALM) from the 120 kW
● The operation of Infeed Modules with different performance values is not permitted within
● An active Voltage Sensing Module (VSM) must be assigned to each Active Line Module
● When using Smart Line Modules (SLM) an active Voltage Sensing Module (VSM) must
Drive functions
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
or V/f control mode.
Modules connected in parallel must have the same output.
Active Line Module (ALM) types is permitted in each case.
Line Module (BLM) is not permitted.
of the Basic Line Module (BLM) type is permitted.
Module (ALM) or Smart Line Module (SLM) of the chassis format. A violation of this rule
causes alarm F05061 to be issued.
function module for Active Line Modules (ALM).
Line Modules (ALM) from the 120 kW performance class for the booksize format.
performance class are permitted within a parallel connection.
a parallel connection.
(ALM) in the parallel connection. A violation of this rule causes alarm F05061 to be
issued.
be assigned to at least one Smart Line Module (SLM) in the parallel connection. A
violation of this rule causes alarm F05061 to be issued.
Basic information about the drive system
13.10 System rules, sampling times and DRIVE-CLiQ wiring
847