Temperature Evaluation Using Ntc Thermistors (Universal Protection, Option) - Siemens Simotics M-1FE1 Series Hardware Installation Manual

6.2.11

Temperature evaluation using NTC thermistors (universal protection, option)

Note
Temperature evaluation using the NTC K227 and NTC PT3-51F thermistors does not
guarantee full motor protection.
The K227 and PT3-51F NTC thermistors are used if the drive system cannot evaluate the
KTY 84 or Pt1000 PTC thermistor.
The NTC thermistors are provided for operating the motor on third-party systems.
The NTC thermistor should be connected in accordance with the configuration and operating
instructions of the third-party system.
The drive system senses and evaluates the motor temperature using the sensor signal (refer
to the drive system documentation).
Table 6- 1
PTC thermistor resistance (25°
C)
Resistance when hot (100° C)
Cable cross-section
Outer diameter
Temperature characteristic
1FE1 synchronous built-in motors
Hardware Installation Manual, 12/2016, 610.43000.40b
Technical data, NTC K227 and NTC PT3-51
Designation
Approx. 32.8 kΩ
Approx. 1800 Ω
0.14 mm
0.8 mm
Technical data
NTC K227
2
Connecting
6.2 Electrical connection
NTC PT3-51F
Approx. 49.1 kΩ
Approx. 3300 Ω
0.14 mm
2
0.8 mm
113