Use of analog inputs as digital inputs

Several (or all) analog inputs can be configured as digital inputs AI523 - Analog Input Module The inputs are not electrically isolated against the other analog channels.

Connection example

The following operating mode can be configured AI523 - Analog Input Module AI523 - Analog Input Module

Digital input	24 V	1 channel used
Effect of incorrect input terminal connection		Wrong or no signal detected, no damage up to 35 V

The function of the LEDs is described under Displays.