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Analog input module (Model no-6ES7 331-7KF02-0AB0, Siemens) is frequently burning during thundering. 06 inputs (MW from Mark V, Pressure transmitter, Temperature Transmitter) from different places have been connected to this module. We have checked the grounding of the respective panels, system and found ok. Even though we have tightened all the possible connections. The ground resistance of the system is less than 0.5 Ohm. Grounding shield of multi-core Control cable is grounded only on the side of Analog input module. Other side is kept open. The main thing is that 08 more modules are there in the same panel. But all remains healthy except that one of the same place. All modules are powered by same power supply.
What may be the probable cause for this problem and what should the remedy?
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What may be the probable cause for this problem and what should the remedy?
[email protected]