Siemens SINAMICS S110 Manual page 141

Temperature sensor input
There are two ways of connecting the temperature sensor:
1. via X133, terminals 7 and 8
2. via X23, pins 1 and 8
However, only one temperature sensor may be connected as otherwise the parallel circuit
will be sensed and incorrect temperature values will be generated.
NOTICE
Damage to motor due to incorrectly connected KTY temperature sensor
If a KTY temperature sensor is connected with incorrect polarity, it is not possible to detect
when the motor overheats. Overheating can cause damage to the motor.
• Connect a KTY temperature sensor with the correct polarity.
SINAMICS S110
Manual, 07/2015, 6SL3097-4AC10-0BP5
CU305 Control Units
7.3 Interface description
141