Siemens SINAMICS S120 Manual page 278

Control Units, Control Unit Adapters and operating components
7.6 Control Unit Adapter CUA32
Temperature sensor input
The temperature sensor is required for motors where the temperature value is not
transmitted via DRIVE-CLiQ.
NOTICE
Damage to motor in the event of 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.
The maximum length of the temperature sensor cable is 300 m. The cables must be
shielded. For cable lengths > 100 m, cables with a cross-section of ≥ 1 mm
"Safe Torque Off" function
If the "Safe Torque Off" function is selected, a 24 V DC voltage must be connected to
terminals 3 and 4. Upon removal, pulse inhibit is activated.
Danger to life due to 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
278
WARNING
separation.
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal
Module TM120.
must be used.
2
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
AC Drive