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Siemens CR 1 · 2015
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Drive systems
SINAMICS S120 Cabinet Modules
Motor Multi Connection Modules
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Overview
If the drive output of a gantry with drive motors is distributed over
multiple axes to achieve a more compact design and enhanced
motion, these motors can be operated cost-optimized in parallel
with a converter with an appropriate total power rating. The Mo-
tor Multi Connection Modules are used to protect the individual
motors from the total power of the converter. Motor Multi Connec-
tion Modules contain the motor circuit breakers. Each motor cir-
cuit breaker protects one motor. Several motor circuit breakers
are connected in parallel on the input side into a section for con-
nection to a Motor Module. The Motor Multi Connection Modules
can be equipped with optional analog measuring instruments
built into the cabinet door for indicating the current motor cur-
rents and current output voltage of the Motor Modules.
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Design
In total, 4 control cabinet versions are available for connecting
12, 16, 20 or 24 motors with an appropriate number of motor
circuit breakers. The motor circuit breakers are designed for
a rated current of 45 A to 63 A. The motor circuit breakers are
always connected at the input side into 4 groups of 3, 4, 5 or 6
motor circuit breakers for connection to Motor Modules. Up to 2
Motor Modules can be connected to one Motor Multi Connection
Module for operating up to 2 sections of motors connected in
parallel. As an option, depending on the control cabinet version,
12, 16, 20 or 24 ammeters for indicating the motor currents as
well as 2 voltmeters for indicating the output voltages of the
Motor Modules can be integrated in the cabinet door of the
Motor Multi Connection Module.
© Siemens AG 2015