Siemens SINAMICS S120 Commissioning Manual page 160

Commissioning
2.12 Notes on commissioning linear motors
Temp-S (PTC element)
The temperature shutdown circuit comprises PTC thermistor temperature sensors (PTC
elements). There is a PTC thermistor temperature sensor for monitoring the motor winding in
each of the three phase-windings (U, V and W). This ensures overload protection, even if the
current in the individual phases of a primary section is not the same - or if several primary
sections have different load levels. The PTC elements are connected in series.
The circuit and connection system for Temp-F and Temp-S are described in detail in the
Configuration Manual; linear motors 1FN3 or 1FN6.
The SME12x (Sensor Module External) is a device with connectors enabling the connection
of various sensors of a direct drive (WMS, Hall sensors, temperature sensors). The output of
the SME12x is connected to SINAMICS drive systems via DRIVE-CLiQ. The requirements
regarding protective separation in accordance with EN 61800-5-1 are fulfilled by the
electrical isolation between the voltage circuits for power and sensors. The SME12x
therefore fulfills the following functions:
● All signal cables can be connected close to the motor.
● Temperature sensors can be fully evaluated:
There are two variants of SME12x:
● SME120 for incremental position measurement systems
● SME125 for absolute position measurement systems
You will find further information on the SME12x in the SINAMICS S120 Manual, Control
Units and Additional System Components, in the chapter "Encoder system connection".
Risk of electric shock if there is no electrical isolation
The circuits of Temp-F and Temp-S neither have "protective separation" between each
other nor to the power circuits in accordance with IEC 61800-5-1.
These specifications are not fulfilled when the temperature monitoring circuits are
connected via the SMC20 Sensor Module. The temperature monitoring circuits must be
connected via the Sensor Module SME12x so that the specifications of the EN 61800-5-1
are fulfilled.
Also refer to the Configuration Manuals for 1FN1, 1FN3 or 1FN6 linear motors.
158
– Thermal motor protection through evaluation of Temp-S
– Display of the temperature curve via evaluation of Temp-F
WARNING
Commissioning Manual, (IH1), 01/2013, 6SL3097-4AF00-0BP3
Commissioning Manual