ABB AC500 V3 Hardware Manual page 589

Fig. 87: Connection of resistance thermometers in 2-wire configuration to the analog inputs
The following measuring ranges can be configured
on page 599
Pt100
Pt1000
Ni1000
For a description of the function of the LEDs, please refer to Diagnosis and displays / Displays
Ä Chapter 1.6.3.1.2.8 "State LEDs" on page 606.
The module DA502 performs a linearization of the resistance characteristic.
To avoid error messages from unused analog input channels, configure them as "unused".
Connection of resistance thermometers in 3-wire configuration to the analog inputs
When resistance thermometers (Pt100, Pt1000, Ni1000) are used, a constant current must flow
through them to build the necessary voltage drop for the evaluation. For this, the module DA502
provides a constant current source which is multiplexed over max. 4 analog input channels.
The following figure shows the connection of resistance thermometers in 3-wire configuration to
the analog inputs AI0 and AI1. Proceed with the analog inputs AI2 and AI3 in the same way.
2022/01/31
Ä Chapter 1.6.3.1.2.9 "Measuring ranges" on page 606:
-50 °C...+400 °C
-50 °C...+400 °C
-50 °C...+150 °C
3ADR010278, 3, en_US
I/O modules > Digital/Analog I/O modules
Ä Chapter 1.6.3.1.2.6 "Parameterization"
2-wire configuration, 1
channel used
2-wire configuration, 1
channel used
2-wire configuration, 1
channel used
Device specifications
589