Howto:What is the maximum lenght of the cable connection between a IP21 and an analog device?

The coverage of the line is about 2x30 Ohm.

If using wire diameters of 0,4 mm there's an maximum lenght of 200m possible.

If using wire diameters of 0,6 mm there's an maximum lenght of 450m possible.

If using wire diameters of 0,8 mm there's an maximum lenght of 800m possible.

On very long cable connections crosstalk problems can occur. But that shouldn't be a problem when using only one a/b line.