Current control

[Tom749]

Hi, When I use the current loop control way, 4~20mA, how long can I send the signal without any loss on the line normally? Is there any information or datasheet about that? Thanks for your help in advance. Edited April 19, 2013 by Tom749

[Homer_BL]

Depends on cable type and cross-section, and on analog signal frequency too. In most cases, using shielded cable 2x0,75mm2, maximum lenght of about 300m is permitted. For voltage drop, example, total resistance (cable + analog input reststance) must not exceed a value 1kOhm, for "static" signals. Edited April 20, 2013 by Homer_BL