Siemens Sinamics S120 Function Manual page 404

Function modules
7.11 Parallel connection of power units
Parallel operation is not released under the following conditions:
● Combining different types of Infeed Module within the same parallel connection (e.g.
● Motor Modules in servo control
● Infeed Modules and Motor Modules in the booksize and blocksize formats
Features
The main features of parallel connection are:
● Parallel connection of up to four Motor Modules on one motor
Additional information and instructions in the Manual SINAMICS S120 Chassis Power Units
must be carefully taken into consideration.
● Parallel connection of up to four power units on the infeed side (closed/open loop).
● A Control Unit, which controls and monitors power units on the line and motor sides
● Redundant operation:
● 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:
402
Basic Line Modules with Smart Line Modules or Basic Line Modules with Active Line
Modules).
– Parallel connection of multiple Motor Modules on one motor with separate winding
systems (p7003 = 1).
Note
Motors with separate winding systems are recommended.
– Parallel connection of multiple Motor Modules on one motor with a single winding
system (p7003 = 0) is possible.
CAUTION
connected in parallel, can control an additional drive, e.g. an auxiliary drive (see Chapter
Additional drive in addition to the parallel connection (Page 412)).
Two Control Units, which control and monitor the line-side and motor-side power units
connected in parallel cannot control additional drives.
connection on the line side and one parallel connection on the motor side.
and for ensuring symmetrical current distribution are recommended.
ff.
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions