Siemens SINAMICS S120 Combi - S120 Combi Power Modules; Introduction

SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3
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S120 Combi Power Modules
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3.1 Introduction
3.1.1 Description
The SINAMICS S120 Combi
The S120 Combi is a Power Module with integrated infeed, Motor Modules (inverter) for 3 or
4 axes and a TTL encoder evaluation for the spindle. The S120 Combi is available in the
following versions for various current ratings:
● 3 axes Power Module with infeed, spindle and 2 feed axes
● 4 axes Power Module with infeed, spindle and 3 feed axes
The Power Modules are cooled using external air cooling that employs through-hole
technology. The required fan unit is optionally available. A fan solution on the customer side
with comparable rated data is possible.
The S120 Combi is infeed/energy-recovery capable. The infeed provides the integrated
Motor Modules with an uncontrolled DC voltage.
In the infeed mode regarding the current and voltage waveforms, the infeed has a typical
characteristic of a 6-pulse diode rectifier bridge. In the energy recovery mode, the current
waveform is a square wave.
The energy recovery is switched in depending on the power that is fed back. Energy
recovery is deactivated when the infeed is operating under no-load conditions.
The integrated Motor Modules operate with a fixed IGBT clock frequency of 4 kHz.
The overload factor for the infeed and all axes is ≤ 2.
The S120 Combi is suitable for direct operation on TN, IT and TT line supplies.
Controlling the motor holding brake
The S120 Combi has an integrated brake control function for a motor holding brake. The
motor holding brake is connected at terminal X11. The assignment of the motor holding
brake to the feed axes of the S120 Combi can be freely parameterized using the software.
Motor holding brakes up to 1 A are controlled.
Temperature sensor connection
A temperature sensor can either be connected using terminal X21 or alternatively using the
sub-D connector of the TTL encoder (X220). The interface used is selected using the
software. In this case, only the selected evaluation is available.