Siemens Sinamics s120 Commissioning Manual page 39

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
or V/f control mode.
● A maximum of four Motor Modules are permitted in a parallel connection. All Motor
Modules connected in parallel must have the same output.
● 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
Active Line Module (ALM) types is permitted in each case.
● Mixed operation of an Active Line Module with a Smart Line Module (SLM) or with a Basic
Line Module (BLM) is not permitted.
● Mixed operation of a drive object of the Smart Line Module (SLM) type with a drive object
of the Basic Line Module (BLM) type is permitted.
● An active Voltage Sensing Module (VSM) must be assigned to each active Active Line
Module (ALM) or Smart Line Module (SLM) of the chassis format. A violation of this rule
causes fault F05061 to be issued.
● Two further Voltage Sensing Modules can be operated with the "network transformer"
function module for Active Line Modules (ALM).
The following applies to parallel connection of Line Modules:
● Parallel connection is permitted for Infeed Modules in the chassis format and for Active
Line Modules (ALM) from the 120 kW performance class for the booksize format.
● 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
performance class are permitted within a parallel connection.
● The operation of Infeed Modules with different performance values is not permitted within
a parallel connection.
● An active Voltage Sensing Module (VSM) must be assigned to each Active Line Module
(ALM) in the parallel connection. A violation of this rule causes alarm F05061 to be
issued.
● When using Smart Line Modules (SLM) an active Voltage Sensing Module (VSM) must
be assigned to at least one Smart Line Module (SLM) in the parallel connection. A
violation of this rule causes fault F05061 to be issued.
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
2.5 System rules, sampling times and DRIVE-CLiQ wiring
Preparation for commissioning
39