1330550250-20°C175HA183.1040003000R(Ω) nominel nominel -5°C nominel +5°C [°C]Illustration 2.27 TripUsing a digital input and 24 V as power supply:Example: The frequency converter trips when the motortemperature is too high.Parameter set-up:Set 1-90 Motor Thermal Protection to [2] Thermistor TripSet 1-93 Thermistor Source to [6] Digital Input 33PTC / ThermistorOFFON+24V12 13 18 3732 A2719 29 33 B20 GNDR<6.6 k Ω >10.8 k Ω130BA151.11Illustration 2.28 Digital Input and 24 V Power SupplyUsing a digital input and 10 V as power supply:Example: The frequency converter trips when the motortemperature is too high.Parameter set-up:Set 1-90 Motor Thermal Protection to [2] Thermistor TripSet 1-93 Thermistor Source to [6] Digital Input 33PTC / Thermistor ROFFON<800 Ω+10V130BA152.10>2.7 kΩ12 13 18 37322719 29 33 20555039 42 53 54Illustration 2.29 Digital Input and 10 V Power SupplyUsing an analog input and 10 V as power supply:Example: The frequency converter trips when the motortemperature is too high.Parameter set-up:Set 1-90 Motor Thermal Protection to [2] Thermistor TripSet 1-93 Thermistor Source to [2] Analog Input 54Do not select a reference source.555039 42 53 54R<3.0 k Ω >3.0 k Ω+10V130BA153.11PTC / ThermistorOFFONIllustration 2.30 Analog Input 10 V Power SupplyInputDigital/analogSupply VoltageVCut-out ValuesThresholdCut-out ValuesDigital 24 < 6.6kΩ - > 10.8kΩDigital 10 < 800Ω - > 2.7kΩAnalog 10 < 3.0kΩ - > 3.0kΩNOTICECheck that the chosen supply voltage follows the specifi-cation of the used thermistor element.Introduction Design GuideMG20Z202 Danfoss A/S © Rev. 06/2014 All rights reserved. 392 2
