We have a system with several Point IO panels. Today had one that burned from the Field Potential Distributor Module. The 120vac output card beside the FPD looked like it had a lot of burn marks but since it is the next card to the right its hard to tell where the problem originated from. Most of the damage was around the terminal block where the FPD receives 120vac power. The other Point IO panels get 120vac from the same source.
Reading about the FPD and its function i think i can rule out the DC side being part of the problem. The 120v output supplies three solenoid valves to control liquid. The valves all test ok using a meter.
There is no suppression devices on these valves. They are not even fused. What do you guys think about adding simple fused terminal blocks to these? Has anyone had one of these fail like this? Any thoughts on the cause? Thanks
Reading about the FPD and its function i think i can rule out the DC side being part of the problem. The 120v output supplies three solenoid valves to control liquid. The valves all test ok using a meter.
There is no suppression devices on these valves. They are not even fused. What do you guys think about adding simple fused terminal blocks to these? Has anyone had one of these fail like this? Any thoughts on the cause? Thanks