Encoder system connection 
  10.2 Sensor Module Cabinet-Mounted SMC30 
SINAMICS S120 Combi 
Manual, 11/2017, 6SL3097-4AV00-0BP7 
239 
Temperature sensor connection 
 
Damage to motor in the event of incorrectly connected KTY temperature sensor 
A KTY temperature sensor connected with incorrect polarity cannot detect if the motor 
overheats. Overheating can cause damage to the motor. 
•  Connect a KTY temperature sensor with the correct polarity. 
You can find information for parameterizing the KTY temperature sensor in the SINAMICS 
S120 Drive Systems Function Manual, in Section "Monitoring and protective functions / 
thermal motor protection". 
 
Note 
The maximum length of the temperature sensor cable is 100
 m. The cables must be 
 
 
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 
separation. 
•  If safe electrical separation cannot be guaranteed (for linear motors or third-party 
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal 
Module TM120. 
 
X524 Electronics power supply 
Table 10- 9  X524: Electronics power supply 
 
Voltage: 24 V (20.4 … 28.8 V) 
Current consumption: Maximum 0.55 A 
Maximum current through the jumper in 
the connector: 20 A 
M  Electronics ground 
Type: Screw terminal 2 (Page 288) 
The maximum cable length that can be connected is 30 m. 
 
Note 
The two "+" and "M" terminals are jumpered in the connector. This ensures that the supply 
voltage is looped through.