Connection of resistors in 2-wire configuration

For evaluating resistors, a constant current must flow through them to build the necessary voltage drop. For this, the module AI531 provides a constant current source which is multiplexed over the 4 analog channels.

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Connection example

The following measuring ranges can be configured AI531 - Analog Input Module AI531 - Analog Input Module:

Resistor 50 kOhm 1 channel used

For a description of the function of the LEDs, please refer to Diagnosis and displays / displays.

In order to avoid error messages from unused analog input channels, it is useful to configure them as “unused”.