Siemens SINAMICS S120 System Manual page 39

Temperature sensor
Danger to life due to electric shock caused by voltage flashovers to the temperature sensor
cable
Voltage flashovers to the signal electronics can occur for temperature sensors without safe
electrical separation.
• Use temperature sensors that fully comply with the specifications of protective
• If safe electrical separation cannot be guaranteed (for linear motors or third-party
NOTICE
Damage due to overheating, caused by a KTY temperature sensor that has been
incorrectly connected
If the KTY temperature sensor was not connected with the correct polarity, motor
overheating may not be detected.
• Connect the KTY sensor with the correct polarity.
NOTICE
Device failure as a result of unshielded or incorrectly routed cables to temperature sensors
Unshielded or incorrectly routed cables to temperature sensors can result in interference
being coupled into the signal processing electronics from the power side. This can result in
significant disturbance of all signals (fault messages) up to failure of individual components
(destruction of the devices).
• Only use shielded cables as temperature sensor cables.
• If temperature sensor cables are routed together with the motor cable, use separately
• Connect the cable shield at both ends to ground potential through a large surface area.
• Recommendation: Use suitable MOTION CONNECT cables.
High Frequency Drive
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
WARNING
separation (safety isolation).
motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal
Module TM120.
shielded cables twisted in pairs.
High Frequency Modules
4.3 HF Motor Module
39