ABB ACQ580 Firmware Manual page 90

86 Program features
The figure below shows typical PTC sensor resistance values as a function of
temperature.
Ohm
4000
1330
550
100
One isolated PTC sensor can also be connected directly to digital input DI6. At the
motor end, the cable shield should be earthed through a capacitor. If this is not
possible, leave the shield unconnected.
See section Insulation
T
M
Temperature monitoring using Pt100 sensors
1...3 Pt100 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 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.
It is possible to adjust the motor temperature supervision limits and select how the
drive reacts when overtemperature is detected.
See section Insulation
T
on page 85.
Control board
DI6
+24 V DC
on page 85.