Siemens Sinamics G110M Original Instructions Manual page 204

Functions
8.7 Protection functions
Temperature switch
PTC sensor
KTY84 sensor
NOTICE
Motor overheating due to incorrectly connected KTY sensor
If a KTY sensor is connected with incorrect polarity, the motor can become damaged due to
overheating, as the converter cannot detect a motor overtemperature condition.
• Connect the KTY sensor with the correct polarity.
204
The converter interprets a resistance ≥ 100 Ω as being an opened temperature
switch and responds according to the setting for p0610.
The converter interprets a resistance > 1650 Ω as being an overtemperature and
responds according to the setting for p0610.
The converter 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 con-
verter shuts down with fault F07016.
Using a KTY sensor, the converter monitors the motor temperature and the sensor
itself for wire-break or short-circuit:
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD