Siemens SINAMICS S120 Device Manual page 359

NOTICE
Damage to motor when KTY temperature sensor is connected incorrectly
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.
NOTICE
Overheating of the motor due to jumpering of the temperature sensor connections
Jumpering of the temperature sensor connections "+ Temp" and "- Temp" results in
incorrect measurement results. Damage to the motor can result if the overheating is not
detected.
• When using several temperature sensors, separately connect the individual sensors to
NOTICE
Overheating of the motor due to cables with too high resistance
Cable length and cable cross-section can falsify the temperature measurement (10 Ω cable
resistance for a PT100 can falsify the measurement result by 10%). Damage to the motor
can result if the overheating is not detected.
• Use only cable lengths ≤ 300 m.
• For cable lengths >100 m, use cables with a cross-section of ≥1 mm
NOTICE
Device failure due to 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 twisted-pair,
• Connect the cable shield at both ends to ground potential over a large surface area.
• Recommendation: Use suitable Motion Connect cables.
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
"+ Temp" and "- Temp".
separately-shielded cables.
8.5 G51 to G54, TM150 temperature sensor module
Options
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