ABB AC500 V3 Hardware Manual page 412

Device specifications
I/O modules > Analog I/O modules
Pt100
Pt100
Pt1000
Ni1000
The I/O module performs a linearization of the resistance characteristic.
In order to avoid error messages from unused analog input channels, it is useful to configure
them as "unused".
Connection of resistance thermometers in 3-wire configuration
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 I/O module
provides a constant current source which is multiplexed over the max. 8 (depending on the
configuration) analog channels.
412
-50 °C...+70 °C
-50 °C...+400 °C
-50 °C...+400 °C
-50 °C...+150 °C
3ADR010278, 3, en_US
2-wire configuration, one
channel used
2-wire configuration, one
channel used
2-wire configuration, one
channel used
2-wire configuration, one
channel used
2022/01/31