Siemens CU240B-2 - Motor Temperature Monitoring Using a Temperature Sensor

Advanced commissioning
6.6 Protection functions
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
265
6.6.2
Motor temperature monitoring using a temperature sensor
Connecting the temperature sensor
It is permissible to use one of the following sensors to protect the motor against
overtemperature:
● Temperature switch (e.g. bimetallic switch)
● PTC sensor
● KTY84 sensor
● PT1000 sensor
Connect the temperature sensor of the motor to terminals
14 and 15 of the inverter.
Temperature switch
The inverter interprets a resistance ≥ 100 Ω as being an opened temperature switch
and responds according to the setting for p0610.
PTC sensor
The inverter interprets a resistance >
1650 Ω as being an overtemperature and re-
sponds according to the setting for p0610.
The inverter interprets a resistance < 20 Ω as being a short
-
circuit and responds with
alarm A07015. If the alarm is present
for longer than 100 milliseconds, the inverter
shuts down with fault F07016.