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130 Program features
In addition to the above, optional FEN-xx encoder interfaces, and FPTC-xx modules
have connections for PTC sensors. Refer to the module-specific documentation
for more information.
Temperature monitoring using Pt100 or Pt1000 sensors
1...3 Pt100 or Pt1000 sensors can be connected in series to an analog input and
an analog output.
The analog output feeds a constant excitation current of 9.1 mA (Pt100) or 1 mA
(Pt1000) 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 the analog input and converts
it into degrees Celsius.
The warning and fault limits can be adjusted by parameters.
For the wiring of the sensor, refer to the Hardware Manual of the drive.
Note: If excitation current is too high for the sensor, use some other means to
measure the temperature.
Temperature monitoring using KTY84 sensors
One KTY84 sensor can be connected to an analog input and an analog output on
the control unit.
The analog output feeds a constant excitation current of 2.0 mA 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 the analog input and converts it into degrees Celsius.
FEN-xx encoder interfaces (optional) also have a connection for one KTY84 sensor.
The figure and table below show typical KTY84 sensor resistance values as a
function of the motor operating temperature.
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