ABB ACS880-01 Series, Firmware Instructions

Page: 117 / 664

Program features 117
voltage over the sensor. The temperature measurement function calculates the
resistance of the sensor and generates an indication if overtemperature is detected.
For wiring of the sensor, refer to the Hardware Manual of the drive.
The figure below shows typical PTC sensor resistance values as a function of
temperature.
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.
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.
100
550
1330
4000
Ohm
T