571018854 12/2015 V01
3.3.8 Temperature Sensors
Sensor type Parameter T
Nat
[° C]
PTC Rated operating temperature 145 (CHA-20 ... 58) / 120 (CHA-14 ... 17)
PTC thermistors, because of their very high positive tempe-
rature coecient at nominal operating temperature (Tnat),
are ideally suited for motor winding predection.
Due to their principle, the PTC sensors should only be used to
monitor the winding temperature.
For motor predection at speeds greater than zero, temperature sensors are integrated in the motor windings. For applications
with high load where the speed is zero, additional predection (eg I ² t monitoring) is recommended. When using the KTY 84-130
the values given in the table can be parametrized in the servo controller or an external evaluation unit.
Table 57.1
Table 57.3
Illustration 57.2
4000
3000
2000
1000
0
T
NAT
-5 ° T
NAT
T
NAT
+5 °
Resistance [Ω]
Temperature [ºC]
The KTY sensor is used for temperature measurement and
monitoring the motor winding.
Because the KTY sensor provides an analogue temperature
measurement, it is also possible to predect the actuator
grease from temperature overload.
Temperature sensors used in the CHA Actuator Series meet
the requirements for safe separation according to EN50178.
Illustration 57.4
1500
1300
1100
900
700
500
300
-20 0 20 40 60 80 100 120 140 160
Resistance [Ω]
Temperature [ºC]
Diagram KTY 84-130
Diagram PTC
Sensor type Parameter Symbol [Unit] Warning Shutdown
KTY 84-130
Temperature T [° C] 80 90
Resistance R [Ω] 882 ± 3% 940 ± 3%
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