Actually I have a control cable of 19 core armored , run of approx 500 mtr , the cable carries digital signal and command for solenoid valve operation, control voltage is 110 v ac , The problem what I am facing is that I am getting induction voltage of 45 vac in all the cores even in spare cores also, so due to which I am getting false signal even though there is a stop command from plc, in field I have a controller for operation of bag filter , from where I take digital input to my IO through my control cable , so even though the bag filter is stopped I get the return signals from control cable due to induction voltage , PLZ give me solution to remove this induction voltage.