Siemens SINAMICS G120 Operating Instructions Manual page 351

in the motor and is connected to the control terminals (see figure below) of the SINAMICS
G120 or the motor temperature model was determined.
Figure 8-81
Note
In order to avoid EMC noise from being coupled-in to the motor/inverter electronics the
associated disturbances is not permissible to use free conductors in the motor cable to
connect the temperature sensor to the motor/inverter.
The temperature sensor must be connected to the motor/inverter using a separate cable (if
at all possible, this cable should be shielded).
With PTC temperature sensor (P0601 = 1)
The PTC is connected to the control terminals 14 and 15 of the SINAMICS G120. PTC
monitoring is activated with the parameter setting P0601 = 1. If the resistance value,
connected at the terminals, is less than 1500 Ω, then neither alarm nor fault is generated. If
this value is exceeded, the inverter outputs alarm A0511 and fault F0011. The resistance
value where the alarm and fault are output is not less than 1000 Ω and not more than
2000 Ω.
Figure 8-82
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
Connecting a temperature sensor
PTC characteristics for 1LG/1LA motors
8.22 Thermal motor protection and overload responses
Functions
8-155