Technical Features Of Temperature Sensors - Siemens SIMOTICS T-1FW6 Operating Instructions Manual

3.4.4.2

Technical features of temperature sensors

Technical features of PTC temperature sensors
Every PTC temperature has a "quasi-switching" characteristic. The resistance suddenly increases
in the vicinity of the response threshold (nominal response temperature ϑ
PTC temperature sensors have a low thermal capacity - and have good thermal contact
with the motor winding. As a consequence, the temperature sensors and the system quickly
respond to inadmissibly high motor winding temperatures.
Table 3-7
Name
Type
Response threshold
(nominal response temperature ϑ
Resistance when cold R (20 °C) in the PTC triplet
and in the individual PTC temperature sensor
1FW6 external rotor built-in torque motors
Operating Instructions, 03/2023, A5E49196960B AC
Technical data of the PTC temperature sensors
)
NAT
Description
PTC triplet acc. to DIN 44082
Individual PTC temperature sensor according to
DIN 44081
130 °C ± 5 K
80 °C ± 5 K
See characteristic
at -20 °C < T < ϑ -20 K
NAT
R ≤ 3 x 250 Ω + 1 x 250 Ω
R ≤ 1000 Ω
Description
3.4 Design
).
NAT
47