Siemens SIMOTICS Series Hardware Installation Manual

Motor components, characteristics and options
4.1 Thermal motor protection
SIMOTICS M-1FE2 built-in motors
62 Hardware Installation Manual, 04/2020, A5E50074509B AA
The drive system senses and evaluates the motor temperature using the sensor signal (refer
to the drive system documentation).
Table 4- 3 Technical specifications, NTC K227 and NTC PT3-51
Designation
Technical specifications
NTC K227
NTC PT3-51F
PTC thermistor resistance
(25 °C)
Approx. 32.8 kΩ Approx. 49.1 kΩ
Resistance when hot (100 °C)
Approx. 1800 Ω
Approx. 3300 Ω
Connection Via the encoder cable AUTOHOTSPOT
cable cross-section
Outer diameter
0.14 mm
2
0.8 mm
0.14 mm
2
0.8 mm
Temperature characteristic

Siemens SIMOTICS Series Specifications

General

Product brand name	SIEMENS
Product designation	SIMOTICS
Efficiency Class	IE1, IE2, IE3, IE4
Ambient Temperature	+60°C
Altitude	Up to 4000 m
Frame Size	63 to 355
Protection Class	IP55, IP56, IP65