Temperature Evaluation Using Ntc Thermistors (Universal Protection, Option) - Siemens SIMOTICS M-1FE1 Configuration Manual

Motor components, characteristics and options
4.1 Motor components
The motor must be de-energized within 1 second when the response temperature is
exceeded.
Table 4- 2
Type (acc. to DIN 44082–M180)
Thermistor resistance (20° C)
Resistance when hot (180° C)
Connection
Cable cross-section/outer diameter
Response temperature
Note: PTC thermistors do not have a linear characteristic curve and are, therefore, not suitable
for determining the instantaneous temperature.
Note
PTC thermistors are ESD components
Carefully observe the ESD instructions.
4.1.1.3

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. Full motor protection is only ensured when the PTC
thermistor triplet is evaluated.
NTC K227 and NTC PT3-51F thermistors are used if the drive system cannot evaluate
Pt1000 thermistors.
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.
54
Technical data for the PTC thermistor triplet
Designation Technical data
PTC thermistor triplet
≤ 750 Ω
≥ 1710 Ω
Via an external trip unit
0.14 mm /0.9 mm
2
180 °C
SIMOTICS M-1FE1 synchronous built-in motors
Configuration Manual, 09/2019, A5E47872980B AA