105
AYK550-UH User’s Manual
Start-Up
The figure below shows alternate thermistor connections. At the motor end the cable
shield should be earthed through a 10 nF capacitor. If this is not possible, leave the
shield unconnected.
For other faults, or for anticipating motor overheating using a model, see Group 30:
Fault Functions.
Group 35: Motor Temp Meas
Code Description Range
Resolution
Default
S
3501
SENSOR TYPE
0…6
1
0
Identifies the type of motor temperature sensor used, PT100 (°C) or PTC (ohms).
See parameters 1501 and 1507.
0 =
NONE
1 = 1 x PT100 – Sensor configuration uses one PT 100 sensor.
• Analog output
AO
1 or
AO
2 feeds constant current through the sensor.
• The sensor resistance increases as the motor temperature rises, as does the voltage over the sensor.
• The temperature measurement function reads the voltage through analog input
AI
1 or
AI
2 and converts it to
degrees centigrade.
2 = 2 x PT100 – Sensor configuration uses two PT 100 sensors.
• Operation is the same as for above 1 x PT100.
3 = 3 x PT100 – Sensor configuration uses three PT 100 sensors.
• Operation is the same as for above 1 x PT100.
4 =
PTC
– Sensor configuration uses one PTC.
• The analog output feeds a constant current through the sensor.
• The resistance of the sensor increases sharply as the motor temperature
rises over the PTC reference temperature (
T
ref
), as does the voltage over
the resistor. The temperature measurement function reads the voltage
through analog input
AI
1 and converts it into ohms.
• The figure shows typical PTC sensor resistance values as a function of
the motor operating temperature.
Motor
T
Thermistor
relay
OMIO board
DI6
+24 VDC
Motor
T
10 nF
Thermistor (0)
OMIO board
DI6
+24 VDC
100
550
1330
4000
Ohm
T
Temperature
Resistance
Normal
0 … 1.5 kohm
Excessive
> 4 kohm
Summary of Contents for AYK 550
Page 256: ...D1 AYK550 UH User s Manual Appendix D Appendix D Base Drive Drawing 205662 Drawings Fig 1...
Page 257: ...AYK550 UH User s Manual D2 Appendix D Base Drive w Fused Disconnect Drawing 205648 Fig 2...
Page 258: ...D3 AYK550 UH User s Manual Appendix D Base Drive w Non Fused Disconnect Drawing 205647 Fig 3...
