Siemens SINAMICS G150 Operating Instructions Manual page 164

Electrical installation
4.11 Other connections
NOTICE
The KTY temperature sensor must be connected with the correct polarity. A sensor
connected up with the incorrect polarity cannot detect if the motor overheats.
NOTICE
When connecting several temperature sensors, the individual sensors must be separately
connected to "+ Temp" and "- Temp".
It is not permissible to jumper the "+ Temp" and "- Temp" signals between the individual
terminal blocks!
NOTICE
Cable length and cross section
Cable length and cross section might influence the temperature measurement
(10 Ω cable resistance for a PT100, can falsify the measurement result by 10 %).
For cable lengths > 100 m, cables with a cross-section of ≥ 1 mm
The maximum cable length is 300 m.
Temperature sensors must always be connected up using shielded cables. The cable
shield must be connected to the ground potential at both ends through a large surface area.
Temperature sensor cables that are routed together with the motor cable must be twisted in
pairs and shielded separately.
162
CAUTION
must be used.
2
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A