Siemens SINAMICS S120 Manual - Página 6

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Siemens SINAMICS S120 Manual
SINAMICS S120 Fail-Safe Drives
Task description
The extended safety functions integrated in the SINAMICS S120 drives are
to be controlled from a TM54F via hardware signals. The drives belong to
different drive groups. The safety-relevant logical pre-processing of the
input signals is handled in an F-CPU.
This application should comply with SIL 2 acc. to EN 62061:2005, ISO
13849-1:2006 PL d or EN 954-1:1996 Category 3.
Solution
Hardware overview
The control of the safety functions SS1 and SLS via the TM54F terminal
expansion module connected to a SINAMICS S120 drive group is shown in
this function example. The SLS initiates a Stop C (SS2 → SOS) as re-
sponse to the fault at the particular drive.
The drive group in the booksize format comprises an infeed and a Double
Motor Module. The motor is controlled using a CU320 Control Unit. The ex-
panded setpoint channel is used to enter the speed setpoint. The two ser-
vomotors – that are independent of one another – are controlled by the
Double Motor Module. A Smart Line Module is used as infeed.
The safety-relevant signals are detected using the fail-safe inputs of an F-
CPU and are then evaluated in the F-CPU. The pre-processed signals are
transferred to the TM54F terminal expansion module via the fail-safe
outputs of the F-CPU. This means that the safety functions integrated in the
drive are controlled in the SINAMICS S120.
I DT Safety Integrated
Page 6/43
Entry ID: 28424136
MC-FE-I-005-V11-EN