1056748 03/2023
1056748 03/2023
77
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Protection from overheating
9.2.3 Servo actuators FHA-C Mini
The motor windings of the FHA-C Mini Servo Actuators do not have a temperature sensor due to their compactness.
The control unit used must protect the actuator against overload. The protection is described in chapter
9.2.4 Servo actuators LynxDrive
Note: The DIN-PTC sensor can only be connected in the "L" version with an 8-pin M23 motor connector. The DIN-PTC
cannot be connected in the "H" version with 6-pin motor connector M23. The exact pin assignments are listed in the
Mechatronics catalogue in the chapter LynxDrive - Electrical Connections.
Note: The DIN-PTC sensor can only be connected in the "L" version with an 8-pin M23 motor connector. The DIN-PTC
cannot be connected in the "H" version with 6-pin motor connector M23. The exact pin assignments are listed in the
Mechatronics catalogue in the chapter LynxDrive - Electrical Connections.
Sensor DIN-PTC in motor power connector
Table 25
Sensor type
Parameter
T
Nat
[°C]
DIN-PTC 91-K135
Nominal response temperature
120
DIN-PTC sensors are well suited as winding protection due to their very high positive temperature coefficient at nominal
response temperature (T
Nat
).
Due to its principle, the DIN-PTC sensor can only protect the winding from overheating. It is not possible to measure the
current winding temperature with a DIN-PTC sensor.
Illustration 8
0
500
1000
1500
2000
2500
3000
3500
4000
-5
0
5
R [
Ω]
T [°C]
DDIIN
N--PPTTCC
Sensor KTY in motor feedback connector
Table 23
Sensor type
Parameter
Symbol
[Unit]
Temperature points (exemplary)
KTY 84-130
Temperature
T [°C]
80
90
100
110
120
130
140
150
Resistance
R [Ω]
882
940
1000
1062
1127
1194
1262
1334
Tolerance
[%]
+/-5%
+/-5%
+/-5%
+/-5%
+/-6%
+/-6%
+/-7%
+/-7%
Recommended switching thresholds
Table 24
Sensor type
Size
Warning [°C]
Switch off [°C]
KTY 84-130
CanisDrive-14A ... 58A
110
120
CanisDrive-20A ... 40A with UL approval
90
100
If the sensor KTY 84-130 is used, the values given in the table must be parameterised in the servo controller or an
external evaluation device.
For actuators with UL mark, the temperature limits for warning and shutdown must be observed.
The sensor KTY is used for temperature measurement and monitoring of the motor winding.
When using the sensor KTY, it is possible to also protect the gear grease from impermissible temperatures.
Illustration 7
0
200
400
600
800
1000
1200
1400
-30
-10
10
30
50
70
90
110
130
150
R [
Ω]
T [°C]
KKTTYY 8844--113300
The shut off temperature must be monitored in the servo controller. As with the DIN-PTC sensor, the switch off
temperature should not exceed 120 °C.
When selecting the switch off temperature, the measuring tolerance of the sensor KTY as well as the tolerance of the
measuring circuit of the servo controller must be taken into account.
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Assembly Instructions Servo Actuators
