Siemens SINAMICS S120 Equipment Manual page 321

Temperature sensor connection
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.
Information for assigning parameters to the KTY temperature sensor can be found in the
SINAMICS S120 Function Manual "Drive Functions" in the Chapter "Monitoring and
protection functions/thermal motor protection".
Note
The maximum length of the temperature sensor cable is 100 m. The cables must be
shielded.
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 protective
• If safe electrical separation cannot be guaranteed (for linear motors or third-party
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
Supplementary system components and encoder system integration
WARNING
separation.
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal
Module TM120.
9.1 Sensor Modules
319