Technical Features Of Temperature Sensors - Siemens SIMOTICS T-1FW6 Series Configuration Manual

Motor components and options
4.1 Motor components
4.1.2.2

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 4- 1
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
Minimum resistance when hot R in the PTC
triplet and in the individual PTC temperature
sensor
Typical characteristic R(ϑ) of a PTC tempera-
ture sensor according to DIN 44081
60
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
See characteristic
at T ≤ ϑ – 5 K
NAT
R ≤ 3 x 550 Ω + 1 x 550 Ω
R ≤ 2200 Ω
at T > ϑ + 5 K
NAT
R ≥ 3 x 1330 Ω + 1 x 1330 Ω
R ≥ 5320 Ω
at T > ϑ + 15 K
NAT
R ≥ 3 x 4000 Ω + 1 x 4000 Ω
R ≥ 16000 Ω
Naturally cooled 1FW6 built-in torque motors
Configuration Manual, 07/2017, 6SN1197-0AE01-0BP3
).
NAT