ABB AC500 V3 - Connection of resistance thermometers in 2-wire configuration

1 4 analog I/O channels
as inputs for 0 V...10 V, -10 V...+10 V, 0 mA...20 mA, 4 mA...20 mA, Pt100/Pt1000/Ni1000
digital signals
as outputs for -10 V...+10 V, 0 mA...20 mA, 4 mA...20 mA
2 4 analog I/O channels
as inputs for 0 V...10 V, -10 V...+10 V, 0 mA...20 mA, 4 mA...20 mA, Pt100/Pt1000/Ni1000
digital signals
as outputs for -10 V...+10 V
The process voltage must be included in the grounding concept of the control
system (e.g. grounding the negative pole).
By installing equipotential bonding conductors between the different parts of the
system, it must be made ensured that the potential difference between ZP and
AGND never exeeds 1 V.
Connection of resistance thermometers in 2-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 8 analog channels.
Device specifications
I/O modules > Analog I/O modules
2022/01/31 3ADR010278, 3, en_US 411