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Connection of digital signal sources at analog inputs

Several (or all) analog inputs can be configured as digital inputs. The inputs are not galvanically isolated against the other analog channels.

Fig. 123: Connection example
AI531-09
Table 219: Configurable measuring ranges

Digital input

24 V

 1 channel used

Effect of incorrect input terminal connection

Wrong or no signal detected, no damage up to 35 V

⮫ “Parameterization”

⮫ Function of the LEDs