Use of Analog Inputs as Digital Inputs

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

The following figure shows the connection of digital sensors to the analog input AI0. Proceed with the analog inputs AI1 to AI3 in the same way.

Use of analog inputs as digital inputs

The following measuring ranges can be configured CI521-MODTCP and CI521-MODTCP :

Digital input

24 V

1 channel used

The function of the LEDs is described under Diagnosis and displays / Displays CI521-MODTCP.