Motor winding1
Double or reinforced insulation2
1…3 PTC sensors3
Analog input. Set the analog input type to V (volt) in parameter group 12 Standard AI.
Define the temperature sensor type, signal source, etc. with parameters 35.11…35.24.
For the sensor type, select: PTC analog I/O.
4
Analog output. Select the Excitation mode for the analog output in parameter group
13 Standard AO.
5
PTC connection 2
If no analog output is available for the PTC connection, it is possible to use a voltage
divider connection. Make sure that the voltage does not exceed the maximum
allowed voltage over the sensor. 1…3 PTC sensors are connected in series with
10 V reference and digital and analog inputs. The voltage over the digital input
internal resistance varies depending on the PTC resistance. The temperature
measurement function reads the digital input voltage through the analog input
and calculates the PTC resistance.
Electrical installation – IEC 83
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