The following measuring ranges can be configured
Ä
Chapter 1.7.6.2.7 “Parameterization”
on page 1024:
Pt100 -50 °C...+400 °C 2-wire configuration, 1
channel used
Pt1000 -50 °C...+400 °C 2-wire configuration, 1
channel used
Ni1000 -50 °C...+150 °C 2-wire configuration, 1
channel used
The function of the LEDs is described under Diagnosis and displays / Displays
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Chapter
1.7.6.2.8 “Diagnosis and State LEDs” on page 1030.
The module CI501-PNIO 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 CI501-
PNIO provides a constant current source which is multiplexed over the 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.
Communication Interface Modules (S500) > PROFINET
2019/04/173ADR010121, 13, en_US1014
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