Measuring The Motor Temperature - Siemens SINAMICS DCM Operating Instructions Manual

10.21

Measuring the motor temperature

SINAMICS DCM provides the possibility of evaluating a temperature sensor integrated in the
motor (see the SINAMICS DCM Parameter Manual, function diagram 8030).
Electric shock in the event of voltage flashovers at the temperature sensor
Voltage flashovers in the signal electronics can occur in motors without safe electrical
separation of the temperature sensors.
• Use temperature sensors that comply with the specifications relating to safe electrical
The following measuring sensors can be evaluated.
● KTY84
approx. 350 Ω up to approx. 2600 Ω at -40 °C to +300 °C
positive temperature coefficient, almost a linear characteristic
Figure 10-70 Characteristic KTY84
● PTC thermistor acc. to DIN 44081 / 44082
600 Ω, 1200 Ω, 1330 Ω or 2660 Ω response temperature
positive temperature coefficient, the resistance changes suddenly at the response
temperature
Note:
It is not possible to determine the actual temperature, it is only possible to identify as to
whether the response temperature has been exceeded or not.
● PT100
approx. 80 Ω up to approx. 280 Ω at -40 °C to +500 °C
positive temperature coefficient, almost a linear characteristic
SINAMICS DCM Control Module
Operating Instructions, 12/2018, A5E34888669A
WARNING
separation.
Descriptions of functions
10.21 Measuring the motor temperature
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