Siemens SINAMICS S120 Commissioning Manual page 141

Temp-S (PTC element)
The
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 Equipment Manual,
Control Units and Additional System Components, in the chapter Encoder System
Connection.
The circuits of Temp-F and Temp-S neither have "protective separation" between each
other nor to the power circuits in accordance with EN 61800-5-1.
Connect Temp-S for thermal motor protection. It is impermissible to not connect Temp-S!
You can optionally connect Temp-F to a measuring instrument for commissioning or test
purposes.
In normal operation, short-circuit the Temp-F connections and connect to PE.
Note
The Temp-F temperature sensor only evaluates the winding temperature of one phase in the
primary section. However, the phases in the synchronous motor have different loads. Higher
temperatures can occur in the phases that are not measured.
Commissioning Manual
Commissioning Manual, (IH1), 01/2011, 6SL3097-4AF00-0BP1
overtemperature shutdown circuit
– Thermal motor protection through evaluation of Temp-S
– Display of the temperature curve via evaluation of Temp-F
DANGER
DANGER
2.13 Commissioning linear motors (servo)
consists of thermistor temperature sensors (PTC
Commissioning
139