widelto
Member
My approach:
In my case I have two Allen Bradley Compactlogix, I use a special security relay from Allen Bradley . This relay receive signal from both plcs (pulses) if one or both pulses are lost then the relay will actuale and trigger an alarm or whaterver you want.
In my case I have two Allen Bradley Compactlogix, I use a special security relay from Allen Bradley . This relay receive signal from both plcs (pulses) if one or both pulses are lost then the relay will actuale and trigger an alarm or whaterver you want.