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line monitoring for PLC

Hello,

For our HVAC solution we use PLC's to control all the components connected. These PLC's have discrete in- and outputs of 24vdc and some analog inputs.

There are analog sensors, open and close end switches connected as inputs and actuators of 24Vdc 3A as outputs through a relay.

The cables we use vary in length from 5 to 50 meters. We want to montitor all cables connected to the PLC for breaking and short circuiting.

My question is if there is a solution to monitor electrical cables in combination with a PLC?

Could someone point me in the right direct on how to solve this? I would apprciate this very much.

Thanks in Advance

BR

Toine