Siemens SINAMICS S120 Commissioning Manual page 95

The two independent temperature circuits Temp-F and Temp-S can be used for motor
protection, either individually or together. At least one Temp_S must be used for the motor
overtemperature protection.
The circuit and connection system for Temp-F and Temp-S are described in detail in:
Configuration Manual for Linear Motors 1FN1 or 1FN3.
The circuits of Temp-F and Temp-S neither have "protective separation" between each
other nor to the power circuits in accordance with VDE 0160/EN 50178.
Temp-S must be connected for thermal motor protection; it is not permissible not to connect
Temp-S!
Temp-F can be optionally connected to a measuring device for commissioning and testing.
For regular operation, the Temp-F connections should be short-circuited and connected to
PE.
Note
The temperature sensor (Temp-F) only evaluates the winding temperature of one phase in
the primary section. The phases in the synchronous motor are, however, loaded to different
degrees with the result that, in the worst case, the phases that are not measured have higher
temperatures.
Note
If protection by electrical separation is provided, Temp-F must not be connected to a Sensor
Module in the SINAMICS drive system without the use of a suitable protection module.
When handling and connecting Temp-F, it must be assumed that when the drive is powered
up, there are hazardous voltages at the terminals on the motor side and at the Temp-F
connecting cable. This means that the drive must always be disconnected to ensure that it
really is in a no-voltage condition.
Note
If protection by electrical separation is provided, Temp-S must not be connected to the PLC
or Sensor Module in the SINAMICS drive system without the use of a thermistor motor
protection (3RN1013-1BW10) or a suitable protection module.
When handling and connecting Temp-F, it must be assumed, that when the drive is powered
up, there are hazardous voltages at the terminals on the motor side and at the Temp-F
connecting cable. This means that the drive must always be disconnected to ensure that it
really is in a no-voltage condition.
Evaluating the temperature sensors
See also: Configuration Manual for Linear Motors 1FN1 or 1FN3.
Commissioning
Commissioning Manual, (IH1), 07/2007 Edition, 6SL3097-2AF00-0BP7
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2.10 Commissioning linear motors (servo)
Commissioning
95