I too am interested in your symptoms of “burning up”. The flex line has done remarkably well for us considering environments of varying combinations of heat, damp, oil, and vibration. The one noteworthy problem we encountered were several flex racks of a later installed production line would have analog inputs and outputs flatline randomly at whatever value was current until the rack was power cycled. Discrete IO in the rack continued to function.
We eventually traced it to lack of grounding. The ground tabs on the back of the bases and ASB modules did not penetrate the oxide layer or other coating of the aluminum mounting rails. IIRC, with the module removed, there’s a visible part of the ground tab in a non-DIN-rail mounting screw hole where you can check tab to actual ground continuity. No module bases read continuity to ground. Changing the rails to steel fixed the problem.
