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Sensor KTY in motor feedback connector
Table 26
Symbol
Sensor type
Parameter
[Unit]
Temperature
T [°C]
80
KTY 84-130
Resistance
R [Ω]
882
Tolerance
[%]
+/-5%
The KTY sensor is used to measure the temperature and monitor the motor winding.
When using the KTY, it is possible to also protect the gear grease from impermissible temperatures.
The temperature sensors used in the LynxDrive Servo Actuators meet the requirements for safe isolation according to
EN 50178.
Illustration 9
K K T T Y Y 8 8 4 4 - - 1 1 3 3 0 0
1400
1200
1000
800
600
400
200
0
-30
-10
10
30
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 shut 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.
Recommended switching thresholds
Table 27
Sensor type
Warning [°C]
KTY 84-130
110
78
Assembly Instructions Servo Actuators
Temperature points (exemplary)
90
100
110
940
1000
1062
+/-5%
+/-5%
+/-5%
50
70
90
110
130
T [°C]
Switch off [°C]
120
1056748 04/2023
9.2.5 Servo actuators FLA
The motor windings of the FLA Series Actuators have an internal temperature sensor. This can be used to monitor and
protect against overheating.
Table 28
120
1127
+/-6%
Sensor
Input voltage
Application area
Characteristic of the measured temperature
Fault tolerance
Attention: As soon as the Hall sensors are supplied with voltage, voltage is also present at the thermistor output. When
the thermistor is not in use, the stranded wire end must be insulated.
The PTC temperature sensor used has a special characteristic curve as described in the table. It is recommended
to evaluate this sensor via an analogue input of a control unit. The assignment described above between measuring
voltage and PTC temperature is valid in the temperature measuring range from +40°C to +100°C.
Table 29
Symbol
Parameter
[Unit]
Temperature
T [°C]
U
[V]
The error tolerance of the PTC sensor is +/- 6 K. The tolerance of the measuring circuit must also be taken into account.
It is recommended to switch off the actuator from a winding temperature of 100°C.
Recommended switching thresholds
Table 30
Sensor type
Thermistor
150
1056748 04/2023
Symbol
11A
14A
[Unit]
Thermistor
U
[V]
DC 5 ±5 %
in
T
[°C]
Amb
Measured temperature [°C] = 132.9 - (Output voltage [V]) x 23.1
T
[K]
err
Temperature points (exemplary)
40
45
50
55
60
65
70
75
4.02
3.81
3.59
3.37
3.16
2.94
2.72
2.51
Warning [°C]
90
17A
20A
40 - 100
±6
80
85
90
95
100
2.29
2.07
1.86
1.64
1.42
Switch off [°C]
100
Protection from overheating
79
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