Siemens SINAMICS S120 Function Manual page 505

● A Control Unit, which controls and monitors power units on the line and motor sides
● Parallel-connected power units must be connected to the same Control Unit.
● A Control Unit CU320-2 can simultaneously actuate a maximum of one parallel
● Components at the line and motor ends for decoupling the parallel-connected power units
● Simple commissioning, because no special parameterization is necessary.
● Individual power units can be parameterized and diagnosed (troubleshooting) with p7000
The following Modules can be connected in parallel:
● Basic Line Modules (BLM), 6-pulse and 12-pulse (each with the associated line reactors)
● Smart Line Modules (SLM), 6-pulse and 12-pulse (each with the associated line reactors)
● Active Line Modules (ALM), 6-pulse and 12-pulse (each with the associated Active
● Motor Modules (in vector control mode)
Note
Deactivate edge modulation
With a chassis parallel connection and motor with winding systems offset by 30 degrees
(p7003 = 2), the converter can fail with activated edge modulation.
In this case, deactivate the edge modulation (p1802 ≤ 4).
Note
Exceptions for combined operation of Line Modules
Smart Line Modules may be operated together with Basic Line Modules whose last digit of
the order number is a "3" (Chassis) or a "2" (Cabinet) with one or several CUs if precisely
defined preconditions and the information in the Configuration Manual are maintained. You
can find this information in the "SINAMICS - Low Voltage Configuration Manual
(https://www.automation.siemens.com/mcms/infocenter/dokumentencenter/ld/Documentsu2
0Catalogs/lv-umrichter/sinamics-engineering-manual-lv-en.pdf)".
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
connected in parallel, can control an additional drive, e.g. an auxiliary drive (see Section
Additional drive in addition to the parallel connection (Page 514)).
connection on the line side and one parallel connection on the motor side.
and for ensuring symmetrical current distribution are recommended.
ff.
Interface Modules)
Function modules
7.10 Parallel connection of power units
503